MALEIC ANHYDRIDE

CAS Number: 108-31-6
EC Number: 203-571-6
Molecular Formula : C4H2O3
Molecular mass: 98.1

Maleic anhydride is an organic compound with the formula C2H2(CO)2O. 
Maleic anhydride is the acid anhydride of maleic acid. 
Maleic anhydride is a colorless or white solid with an acrid odor. 
Maleic anhydride is produced industrially on a large scale for applications in coatings and polymers.

Maleic anhydride is a cyclic dicarboxylic anhydride that is the cyclic anhydride of maleic acid. 
Maleic anhydride has a role as an allergen. 
Maleic anhydride is a cyclic dicarboxylic anhydride and a member of furans.

Maleic anhydride is widely used in chemical industry, mainly in polymerization processes producing high-demand polymer compounds. 
Approximately 50-55% of world maleic anhydride output is used in production of unsaturated polyester resins, which are basic for the manufacturing of fiberglass and other polymeric construction materials.

MAN is used for the manufacture of compositions, which form a strong and plastic polymer film once they are applied to various surfaces. 
The technology is commonly implemented in protective coating of building sites. 
Maleic anhydride is used as a plasticizer in concrete, providing better viscosity and pot life.
Polymerization reactions with maleic anhydride are used for production of fibers and various additives for modification of coatings, providing increase of hardness lifetime.

Maleic anhydride is an important intermediate in the chemical industry. 
Maleic anhydride is structurally similar to furfural, a compound that can be produced from agricultural waste and used as a renewable chemical feedstock.

Uses of Maleic anhydride:
Maleic anhydride is used in many applications.

General description of Maleic anhydride:
The structure of maleic acid consists of four carbon molecules along with carboxylate groups on either ends, with a double bond between the central carbon atoms. 
The anhydride of maleic acid has five atoms in its cyclic molecule, the unsaturated bond undergoes free radical polymerization in the presence of an initiator.

Maleic anhydride is used in following synthetic processes:
-synthesis of fumaric, malic, succinic, maleic acids;
-maleic acid hydrazide (plant growth regulator);
-defoliants (e.g. endotal);
-fungicides (canton, etc.);
-insecticides (kalbofos);
-production of polyester and alkyd resins for construction industry;
-as an additive to lubricating oils to reduce friction;
-as a feedstock in the production of tetrahydrophthalic anhydride, THF and butyrolactone;
-manufacturing of paints, varnishes and lacquers to obtain water-soluble polymers;
-in artificial sweeteners and flavor enhancements;
-for paper sizing agents, water treatment detergents, hair sprays and pharmaceuticals.

Maleic anhydride Application
Maleic anhydride may be used in the synthesis of unsaturated polyester resins and as a reactant in synthesizing important products such as agricultural chemicals, lubricant additives and food acidulatents.

Maleic anhydride Description
Maleic Anhydride (MAN) is an organic compound with the chemical formula C4H203. 
Maleic anhydride is the acid anhydride of maleic acid and in Maleic anhydrides pure state Maleic anhydride is a colourless or white solid with an acrid odour. 
Maleic anhydride is truly a remarkable molecule in that Maleic anhydride possesses two types of chemical functionality making Maleic anhydride uniquely useful in chemical synthesis and applications.

Maleic Anhydride is a multifunctional chemical intermediate with applications in several fields of chemical industry. 
Maleic anhydrides major end use is as feedstock in the production of unsaturated polyester resins (UPR).
These resins are used both in glass-reinforced and in unreinforced applications. 
The UPR end uses includes a wide range of applications in construction, marine and automobile industries.
In addition, Maleic Anhydride can also be used as raw material in the production of 1,4-butanediol (BDO), gamma- butyrolactone and tetrahydrofuran (THF). 
Maleic anhydride is important to highlight that BDO is one of the world's fastest growing chemicals in the last years.

Maleic anhydride Chemical Properties
Maleic anhydride is colorless needles, white lumps, or pellets. Irritating, choking odor.

Maleic anhydride Physical properties
White, hydroscopic crystals (usually shipped as briquettes). 
Odor threshold concentration is 0.32 ppm.

Maleic anhydride Uses
In the manufacture of polyester resins, fumaric acid, agricultural pesticides, and alkyl resins
Maleic Anhydride is heterocyclic compound used in the manufacture of unsaturated polyester resins. 
Maleic Anhydride has a wide range of other applications; Maleic anhydride is used in synthetic tensides, insecticides, herbicides and fungicides.
In Diels-Alder syntheses (as a dienophile), manufacture of alkyd-type of resins, dye intermediates, pharmaceuticals, agricultural chemicals (maleic hydrazide, malathion), in copolymerization reactions.

Maleic anhydride Definition
ChEBI: A cyclic dicarboxylic anhydride that is the cyclic anhydride of maleic acid.

Maleic anhydride Production Methods
Maleic anhydride was traditionally manufactured by the oxidation of benzene or other aromatic compounds. 
As of 2006, only a few smaller plants continue to use benzene; due to rising benzene prices, most maleic anhydride plants now use n-butane as a feedstock.
In both cases, benzene and butane are fed into a stream of hot air, and the mixture is passed through a catalyst bed at high temperature. 
The ratio of air to hydrocarbon is controlled to prevent the mixture from catching on fire. 
Vanadium pentoxide and molybdenum trioxide are the catalysts used for the benzene route, whereas vanadium and phosphorus oxides are used for the butane route.
2 CH3CH2CH2CH3 + 7 O2 → 2 C2H2(CO)2O + 8 H2O.

Maleic anhydride Preparation
To a flask equipped with a Dean-Stark trap, condenser, and mechanical stirrer is added 116 gm (1.0 mole) of maleic acid and 120 ml of tetrachloroethane. 
The contents are heated, the water (18 ml, 1.0 mole) distilled off as the azeotrope, and the residue distilled under reduced pressure to afford 87.7 gm (89.5%) of the anhydride, b.p. 82-84°C (15 mm), m.p. 53°C. 
The residue remaining in the flask consists of about 10 gm of fumaric acid, m.p. 287°C.
Fumaric and maleic acids both give maleic anhydride on heating. 
Fumaric acid must first be heated to a higher temperature to effect its conversion to maleic acid prior to its dehydration.

Maleic anhydride Plastics & resins
Around 50% of world maleic anhydride output is used in the manufacture of unsaturated polyester resins (UPR). 
Chopped glass fibers are added to UPR to produce fiberglass reinforced plastics that are used in a wide range of applications such as pleasure boats, bathroom fixtures, automobiles, tanks and pipes.
Maleic anhydride is hydrogenated to 1,4-butanediol (BDO), used in the production of thermoplastic polyurethanes, elastane/Spandex fibers, polybutylene terephthalate (PBT) resins and many other products.

Maleic anhydride Curing agents
Diels-Alder reaction of maleic anhydride and butadiene and isoprene gives the respective tetrahydrophthalic anhydrides which can be hydrogenated to the corresponding hexahydrophthalic anhydrides. 
These species are used as curing agents in epoxy resins. 
Another market for maleic anhydride is lubricating oil additives, which are used in gasoline and diesel engine crankcase oils as dispersants and corrosion inhibitors. 
Changes in lubricant specifications and more efficient engines have had a negative effect on the demand for lubricating oil additives, giving flat growth prospects for maleic anhydride in this application.

Maleic anhydride Others
A number of smaller applications for maleic anhydride. 
The food industry uses malic acid which is derivative of maleic anhydride in artificial sweeteners and flavour enhancements. 
Personal care products consuming maleic anhydride include hair sprays, adhesives and floor polishes. 
Maleic anhydride is also a precursor to compounds used for water treatment detergents, insecticides and fungicides, pharmaceuticals, and other copolymers.

Synonym(s): 2,5-Furandione
Empirical Formula (Hill Notation): C4H2O3
CAS Number: 108-31-6
Molecular Weight: 98.06
Beilstein/REAXYS Number: 106909
EC Number: 203-571-6
MDL number: MFCD00005518
PubChem Substance ID: 24896701
NACRES: NA.23

Maleic anhydride is a solid at room temperature, which is obtained from the partial oxidation (solid-bed) of n-butane with air. 
The main industrial application of maleic anhydride is glycol polymerization and unsaturated epoxides linear with polyesters. 
Maleic anhydride is sold in liquid form, in trucks at a temperature no lower than 52ºC.

Maleic anhydride appears as colorless crystalline needles, flakes, pellets, rods, briquettes, lumps or a fused mass. 
Melts at 113°F. 
Shipped both as a solid and in the molten state. 
Vapors, fumes and dusts strong irritate the eyes, skin and mucous membranes. 
Flash point 218°F. 
Autoignition temperature 890°F. 
Maleic anhydride is used to make paints and plastics and other chemicals.
Maleic anhydride is used in the formulation of resins. 

Maleic anhydride is produced by oxidation of benzene or a C4 hydrocarbon such as butane in the presence of a vanadium oxide catalyst. 
Maleic anhydride can be converted to maleic acid by hydrolysis and to esters by alcoholysis.

CAS: No. 108-31-6 (T)
EINECS: No. 203-571-6

Chemical formula: C4H2O3
Molar mass: 98.057 g·mol−1
Appearance: White crystals or needles
Odor: irritating, choking
Density: 1.48 g/cm3
Melting point: 52.8 °C (127.0 °F; 325.9 K)
Boiling point: 202 °C (396 °F; 475 K)
Solubility in water: Reacts
Vapor pressure: 0.2 mmHg (20°C)
Magnetic susceptibility (χ): -35.8·10−6 cm3/mol

About Maleic anhydride: 
Maelic anhydride, an organic compound, is the acid anhydride of maelic acid. 
In Maleic anhydrides pure state maelic anhydride is a colourless solid and has a pungent odour. 
Maleic anhydride is toxic and an irritant to the skin. 
Maleic anhydride is used to manufacture unsaturated polyester resins which are used in the housing, automotive and marine industries. 
Maleic anhydride is also used as chemical intermediate to manufacture a broad range of consumer goods. 

Maleic anhydride Identification Features : 
CAS Number: 108-31-6
H.S. Code: 2917.14.5000
Chemical formula: C4H2O3 
Chemical Properties: 
Melting point: -51-53 C
Boling point:  202 C
Specific gravity: 1.48
Solubility in water: Hydrolysis
Vapour density: 3.4

Production Process: 
Benzene or n-butane is used as a feedstock for the production of maleic anhydride. 
Benzene or butane is fed into a stream of hot air and the mixture is passed through a catalyst bed at elevated temperature. 
Vanadium and phosphorus oxides are used as catalysts when butane is used as the feedstock.
Vanadium pentoxide and molybdenum trioxide are the catalysts used for the benzene route.
2 CH3CH2CH2CH3 + 7 O2 → 2 C2H2 (CO) 2O + 8 H2O

Maleic anhydride Uses :
Maleic anhydride is used to manufacture unsaturated polyester resins.
Maleic anhydride is used to produce 1,4- butanediol.
Maleic anhydride is used in food and personal care industry.
Maleic anhydride is used to manufacture insecticides and fungicides.
Maleic anhydride is used in pharmaceutical industry.
Maleic anhydride is used in motor oil additives, artificial sweeteners, flavour enhancers etc.

Maleic anhydride is mainly used for the production of unsaturated polyester resin, alkyl resins, also used in pesticides, pharmaceuticals, paints, ink, lubricant additives, paper chemicals, textiles finishing agent, and surface active agent field. 
In addition, maleic anhydride as raw material also can produce 1,4-butanediol, γ-butyrolactone ( GBL ), tetrahydrofuran ( THF ), maleic acid, fumaric acid and tetrahydro anhydride and a series of widely used chemical products.

Maleic anhydride Production
Maleic anhydride is produced by vapor-phase oxidation of n-butane. 
The overall process converts the methyl groups to carboxylate and dehydrogenates the backbone. 
The selectivity of the process reflects the robustness of maleic anhydride, with its conjugated double-bond system. 

Traditionally maleic anhydride was produced by the oxidation of benzene or other aromatic compounds. 
As of 2006, only a few smaller plants continue to use benzene.
In both cases, benzene and butane are fed into a stream of hot air, and the mixture is passed through a catalyst bed at high temperature. 
The ratio of air to hydrocarbon is controlled to prevent the mixture from igniting. 

Vanadium pentoxide and molybdenum trioxide are the catalysts used for the benzene route, whereas vanadium phosphate is used for the butane route:
C4H10 + 3.5 O2 → C4H2O3 + 4 H2O ∆H = −1236 kJ/mol
The main competing process entails full combustion of the butane, a conversion that is twice as exothermic as the partial oxidation.
The traditional method using benzene became uneconomical due to the high and still rising benzene prices and by complying with the regulations of benzene emissions. 

In addition, in the production of maleic anhydride (4 C-atoms) a third of the original carbon atoms is lost as carbon dioxide when using benzene (6 carbon atoms). 
The modern catalytic processes start from a 4-carbon molecule and only attaches oxygen and removes water; the 4-C-base body of the molecule remains intact. 
Overall, the newer method is therefore more material efficient.
Parallels exist with the production of phthalic anhydride: While older methods use naphthalene, modern methods use o-xylene as feedstock.

CAS Number: 108-31-6
CHEBI:474859  
ChEMBL: ChEMBL374159 
ChemSpider: 7635 
ECHA InfoCard: 100.003.247 
EC Number: 203-571-6
PubChem CID: 7923
RTECS number: ON3675000
UNII: V5877ZJZ25 check
CompTox Dashboard (EPA): DTXSID7024166

Reactions
The chemistry of maleic anhydride is very rich, reflecting its ready availability and bifunctional reactivity. 
Maleic anhydride hydrolyzes, producing maleic acid, cis-HOOC–CH=CH–COOH. 
With alcohols, the half-ester is generated, e.g., cis-HOOC–CH=CH–COOCH3.
Maleic anhydride is a classic substrate for Diels-Alder reactions.
Maleic anhydride was used for work in 1928, on the reaction between maleic anhydride and 1,3-butadiene, for which Otto Paul Hermann Diels and Kurt Alder were awarded the Nobel Prize in 1950. 
Maleic anhydride is through this reaction that maleic anhydride converted to many pesticides and pharmaceuticals.

Michael reaction of maleic anhydride with active methylene or methine compounds such as malonate or acetoacetate esters in the presence of sodium acetate catalyst. 
These intermediates were subsequently used for the generation of the Krebs cycle intermediates aconitic and isocitric acids.
Maleic anhydride dimerizes in a photochemical reaction to form cyclobutane tetracarboxylic dianhydride (CBTA). 
Maleic anhydride is used in the production of polyimides and as an alignment film for liquid crystal displays.

Maleic anhydride is also a ligand for low-valent metal complexes, examples being Pt(PPh3)2(MA) and Fe(CO)4(MA).
On account of Maleic anhydrides cycle of 4 π electrons in an array of 5 atoms with p orbitals, maleic anhydride was long thought to exhibit antiaromaticity. 
However, a thermochemical study concluded that only 8 kJ/mol of destabilization energy can be ascribed to this effect, making it weakly antiaromatic at best.

Preferred IUPAC name: -Furan-2,5-dione
Quality Level: 200
vapor density: 3.4 (vs air)
vapor pressure: 0.16 mmHg ( 20 °C)
assay: 99%
form: briquettes
autoignition temp.: 870 °F
expl. lim.: 7.1 %
bp: 200 °C (lit.)
mp: 51-56 °C (lit.)
SMILES string: O=C1OC(=O)C=C1
InChI: 1S/C4H2O3/c5-3-1-2-4(6)7-3/h1-2H
InChI key: FPYJFEHAWHCUMM-UHFFFAOYSA-N

Maleic anhydride Definition
maleic anhydride: A colourlesssolid, C4H2O3, m.p. 53°C, the anhydrideof cis-butenedioic acid (maleicacid). 
Maleic anhydride is a cyclic compound with aring containing four carbon atomsand one oxygen atom, made by thecatalytic oxidation of benzene or itsderivatives at high temperatures. 
Maleic anhydride isused mainly in the manufacture ofalkyd and polyester resins andcopolymers.

Maleic anhydride Reactions
The chemistry of maleic anhydride is very rich, reflecting its ready availability and bifunctional reactivity. 
Maleic anhydride hydrolyzes, producing maleic acid, cis-HOOC–CH=CH–COOH. 
With alcohols, the halfester is generated, e.g., cis-HOOC–CH=CH–COOCH3.
Maleic anhydride is a potent dienophile in Diels-Alder reactions. 
Maleic anhydride is also a ligand for low-valent metal complexes, examples being Pt(PPh3)2(MA) and Fe(CO)4(MA).
Maleic anhydride dimerizes in a photochemical reaction to form cyclo butane tetra carboxylic dianhydride (CBTA). 
Maleic anhydride is used in the production of polyimides and as an alignment film for liquid crystal displays.

Maleic anhydride General Description
Colorless crystalline needles, flakes, pellets, rods, briquettes, lumps or a fused mass. 
Melts at 113°F. 
Shipped both as a solid and in the molten state.
Vapors, fumes and dusts strong irritate the eyes, skin and mucous membranes. 
Flash point 218°F. 
Autoignition temperature 890°F. 
Used to make paints and plastics and other chemicals.

Maleic anhydride Air & Water Reactions
Maleic anhydride is soluble in water. 
Reacts slowly with water to form maleic acid and heat.

Maleic anhydride Reactivity Profile
Maleic anhydride react vigorously on contact with oxidizing materials. 
Reacts exothermically with water or steam. 
Undergoes violent exothermic decomposition reactions, producing carbon dioxide, in the presence of strong bases (sodium hydroxide, potassium hydroxide, calcium hydroxide), alkali metals (lithium, sodium, potassium), aliphatic amines (dimethylamine, trimethylamine), aromatic amines (pyridine, quinoline) at temperatures above 150° C. 
A 0.1% solution of pyridine (or other tertiary amine) in Maleic anhydride at 185°C gives an exothermic decomposition with rapid evolution of gas.
Maleic anhydride is known as an excellent dienophile in the Diels-Alder reaction to produce phthalate ester derivatives. 
These reactions can be extremely violent, as in the case of 1-methylsilacyclopentadiene. 
Maleic anhydride undergoes a potentially explosive exothermic Diels-Alder reaction with 1-methylsilacyclopenta-2,4-diene at 150C, and is considered an excellent dieneophile for Diels-alder reactions. 

Maleic anhydride is a multifunctional basic chemical compound used in various chemical processes. 
The article describes processes of maleic anhydride production and purification.

Maleic anhydride is an important chemical intermediate with wide industrial applications: from production of unsaturated polyester resins up to API synthesis. 
Normally MAN is colorless or white solid with rhombic crystal structure with an acrid odor. 

Formula: C4H2O3
Molecular mass: 98.1
Boiling point: 202°C
Melting point: 53°C
Density: 1.5 g/cm³
Solubility in water: reaction
Vapour pressure, Pa at 25°C: 25
Relative vapour density (air = 1): 3.4
Flash point: 102°C c.c.
Auto-ignition temperature: 477°C
Explosive limits, vol% in air: 1.4-7.1 

Maleic anhydride Characteristics: Since maleic acid molecule has a double bond and two carbonyl groups, it is rich in reactivity and has good biodegradability.

Maleic Anhydride (MA) is used as the ingredient of unsaturated polyester resin and paper-sizing agent. 
We manufacture high-quality MA by extracting effective ingredients from the gases which occur during process.

Maleic anhydride (CAS 108-31-6) derives from natural malic acid. 
Maleic anhydride as well as maleic and fumaric acids were first prepared in the 1830s. 
However, commercial manufacture did not begin until a century later. 
In 1933, the National Aniline and Chemical Co., Inc., used a process for producing maleic anhydride based on benzene oxidation using a vanadium oxide catalyst. 
Advances in catalyst technology, increased regulatory pressures, and continuing cost advantages of butane over benzene have led to a rapid conversion of benzene- to butane-based plants. 
By the mid-1980s in the United States, 100% of maleic anhydride production used butane as the feedstock.

Other names
-Maleic anhydride
-cis-Butenedioic anhydride
-2,5-Furanedione
-Maleic acid anhydride
-Toxilic anhydride

Features of Maleic Anhydride Activated Plates:
• Spontaneously react with primary amines
• A direct, simple approach to covalently attach molecules to the well surface of an EIA plate
• Maleic anhydride maintains Maleic anhydrides integrity and availability for coupling for months under dry, room temperature conditions

Maleic anhydride Applications: Maleic anhydride has a very broad range of uses from food additives to industrial applications.

Maleic Anhydride
Maleic anhydride (MA) is mainly used in the production of unsaturated polyester resins (UPR). It requires expert handling.

Maleic anhydride (MA) is a clear liquid with a very unpleasant odor. 
The chemical intermediate product consists of the raw material benzene or n-butane. 
The downstream products are fumaric acid, malic acid and succinic acid, as well as butandiol. 
These are manufactured in an integrated production process. 
Maleic anhydride exists in both liquid and solid form (pastilles, briquettes or flakes). 
90% of the European demand is served with liquid product. 

Due to its chemical structure, maleic anhydride is a highly reactive product. 
Maleic anhydride is hygroscopic and changes under extreme heat. 
The melting point is 53°C. 
The handling of maleic anhydride requires expert skills. 
HELM AG has years of experience in the logistics of handling this product and specially trained staff. 
Moreover, HELM only works with professional service providers with the requisite skills.
HELM AG has a large global supplier portfolio which is offering added value to the consumers as this reduces the dependence on local or individual producers. 

Examples of applications
A typical field of application with a share of around 50% is in unsaturated polyester resins (UPR). 
Maleic anhydride is also used in the production of solvents, adhesives, lubricants, cleaning agents, surface treatment additives and dyes.

What Does Maleic Anhydride Mean?
Maleic anhydride is a chemical substance with the chemical formula C4H2O3 that is cyclic dicarboxylic in nature and obtained via the removal of all water molecules from its structure. 
Maleic anhydride is generally a very reactive chemical intermediate that is used in almost every field of industrial chemistry. 
Maleic anhydride is an anhydride, colorless, and used to produce resins and lubricant additives that are vital substances used for corrosion prevention.

Synthetic resin raw material (unsaturated polyesters)
Paints and coatings
Resin modifiers
Vinyl chloride stabilizers
Food additives (fumaric acid, succinic acid, malic acid)
Agricultural chemicals
Paper sizing agents
Imides
Surfactants
Plasticizers (DOM, DBM, DEM)
Other (GBL, 14BG, THF)

Maleic anhydride is a versatile chemical intermediate used to make unsaturated polyester resins, lube oil additives, alkyd resins, and a variety of other products. 
In 1995, global production of maleic anhydride was estimated at 1.8 billion pounds, with an estimated value of $700 million. 
Over the last five years, world consumption has increased at an average annual rate of 5.8%, with the fastest growth occurring in Asia, where Maleic anhydride is used as an intermediate for production of 1,4-butanediol. 
The goal of this project is to design a grass roots facility that is capable of producing 40 million pounds of maleic anhydride per year from n-butane.

Maleic anhydride Applications:
Unsaturated polyester resin
Fine chemical products
Paper-sizing agent, ink, paints, resin modifier
1,4-Butanediol, cleaning agent for secondary battery

MALEIC ANHYDRIDE
Maleic anhydride is an organic compound obtained by the transformation of Benzene or normal butane, both derived from oil, through the use of catalysts (catalytic oxidation process).
Maleic anhydrides production, initially based on the fixed bed technology from benzene, was supplemented by the fluidized bed from normal butane in the ‘90s.

Maleic anhydride, highly versatile for its reactivity, is used as a raw material for the production of:
-unsaturated polyester resins
-additives for lubricating oils
-copolymers for water treatment
-solvents
-esters
-synthetic fibers
-many products that are used in very diverse industrial sect

We are the leading global producer of maleic anhydride and the leading licensor of maleic anhydride manufacturing technology. 
Maleic anhydride is a highly-versatile chemical intermediate used to produce unsaturated polyester resins (UPR), the primary ingredient in fiberglass reinforced resins used for marine and automotive applications, and in construction products like countertops, tubs and sinks. 
Maleic anhydride is also used in the production of lubricants, food additives and artificial sweeteners.

Maleic anhydride Storage and Handling
The Japan Fire Service Law does not apply to maleic anhydride.  
When handling, avoid contact with eyes and skin by using proper protective equipment such as goggles and gloves.  
If skin contact occurs, wash immediately with soap and water.

Maleic anhydride (MAN) is a multifunctional chemical intermediate with applications in several fields of the chemical process industries (CPI). 
Maleic anhydrides major end use is as feedstock in the production of unsaturated polyester resins (UPR). 
In addition, maleic anhydride can be used as a raw material in the production of 1,4-butanediol (BDO), gamma-butyrolactone (GBL) and tetrahydrofuran (THF). 
BDO has been one of the world’s fastest growing chemicals in recent years.

Appearance: White crystals
Water-soluble form: Clear colorless
Melting Point (℃): >52
Purity (%): >99.5
Dissolution Test (Hazen): <20
Iron (%): <0.0005

We are recognized as one of the leading suppliers of Maleic Anhydride. 
Offered anhydride is checked on various parameters to ensure Maleic anhydrides purity, which is highly appreciated by the clients. 
These are extensively used in boats, autos, trucks, buildings, piping, and electrical goods, thus, are highly demanded in the market. 
Our range of products is colorless in nature and available in varied sized packagings. 
Maleic Anhydride is known for its various features like longer shelf life, accurate composition and precise pH value.

Maleic anhydride Features:
Pure white refined solid at room temperature
Transparent liquid if heated
Sublimate properties

MAN – Maleic Anhydride – is a low molecular weight, unsaturated, carboxylic anhydride. 
The clear, colorless molten product is available in rail tank cars, tank trucks, and ISO (intermodal) tank containers.

Maleic anhydride is used in the manufacturing of unsaturated polyester resin which is used in Automobiles, Tanks and Pipes, Epoxy resin, Lubricating oil additives and in food industries. 
Another market for maleic anhydride is lubricating oil additives, which are used in gasoline and diesel engine crankcase oils as dispersants and corrosion inhibitors. 
The food industry uses malic acid which is derivative of maleic anhydride in artificial sweeteners and flavour enhancements. 
Personal care products consuming maleic anhydride include hair sprays, adhesives and floor polishes.
Maleic anhydride is also a precursor to compounds used for water treatment detergents, insecticides and fungicides, pharmaceuticals, and other copolymers.

In coating resins MAN:
-Introduces cure sites for crosslinking in reactive cure coatings like alkyds
-Provides a reactive site for UV-cured coatings
-Elevates glass transition temperature to improve hardness and shorten dry times

MAN is a versatile chemical platform with two distinctive reactive sites and is:
-An essential component in making unsaturated polyester resins
-Key to many lubricating oil additives, dispersants and corrosion inhibitors
-Necessary to prepare alkenyl succinic anhydrides (ASA) used in paper sizing, detergents, oil field chemicals, and epoxy curing agents
-Reacted into copolymers with vinyl ethers, styrene, and acrylic acid used in adhesives, textiles, cosmetics, toothpaste, emulsifiers, dispersants, paints and inks
-Used to synthesize malic acid for flavor enhancement and pH control in food and beverages
-An intermediate leading to fumaric acid, agricultural chemicals, water treatment agents, fire retardants, and sweeteners

Maleic anhydride is known to react with conjugated compounds, e.g., butadiene, usually producing simple cyclic systems, and with unsaturated olefinic substances like styrene and vinyl acetate, producing long-chain heteropolymers. 
Maleic anhydride is now demonstrated that maleic anhydride, under the influence of a little benzoyl peroxide, will react in solution with rubber on heating, yielding a variety of tough, fibrous or resinous products. 
Maleic anhydride is shown that these derivatives are not produced by the action of maleic anhydride alone or of benzoyl peroxide alone, nor are they mixtures of rubber and maleic anhydride polymer. 
As a result of the reaction, rubber has been found to undergo an increase in weight ranging from a few per cent up to about 120%, according to experimental conditions. 
The corresponding derivatives differ greatly from rubber in mechanical properties, and range from products which are tough, rubbery and non-tacky, to hard and brittle resins. 
The effect of varying the quantity of benzoyl peroxide between 1% and 10%, and of using greater excess, is demonstrated.

The effect of varying the maleic anhydride/C5H8 ratio between 0.05 and 5 is demonstrated. 
Maleic anhydride is is shown that the nature of the solvent greatly influences the extent of reaction. 
The use of benzene, toluene, xylene, carbon terachloride, chloroform, decalin, and cyclohexane is discussed. 
The influence of concentration and the occurrence of gelling have been investigated. 
The derivatives are very different from rubber in their solubility characteristics.

CAS Registry Number: 108-31-6
CAS Name: 2,5-Furandione
Additional Names: cis-butenedioic anhydride; toxilic anhydride
Molecular Formula: C4H2O3
Molecular Weight: 98.06
Percent Composition: C 48.99%, H 2.06%, O 48.95%

MALEIC ANHYDRIDE
2,5-Furandione
108-31-6
furan-2,5-dione
Maleic acid anhydride
Toxilic anhydride
cis-Butenedioic anhydride
Dihydro-2,5-dioxofuran
Poly(maleic anhydride)
Polymaleic anhydride
Maleinanhydrid
2,5-dihydrofuran-2,5-dione
RCRA waste number U147
NSC 137651
Anhydrid kyseliny maleinove
UNII-V5877ZJZ25
MALEICANHYDRIDE
CHEBI:474859
MFCD00005518
24937-72-2
V5877ZJZ25
Maleic Anhydrides
2,5-Furandione, homopolymer
Maleic anhydride, 99%, pellets
Maleinanhydrid [Czech]
Maleic anhydride polymer
Maleic anhydride oligomer
Poly(maleic acid anhydride)
2,5-Furanedione
Maleic anhydride, homopolymer
CCRIS 2941
HSDB 183
Maleic acid anhydride homopolymer
Anhydrid kyseliny maleinove [Czech]
EINECS 203-571-6
UN2215
Maleic anhydride, polymers
RCRA waste no. U147
BRN 0106909
AI3-24283
Maleic anhydride polymer, phenyl-terminated
fumaric anhydride
Maleic anhydride, homopolymer, diphenyl terminated
furan-2,5-quinone
68261-15-4
PubChem16845
ACMC-1CROF
Maleic anhydride, 99%
Maleic Anhydride (MAN)
DSSTox_CID_4166
Epitope ID:122673
EC 203-571-6
Lytron 810 (Salt/Mix)
Lytron 820 (Salt/Mix)
Maleic anhydride, briquettes
DSSTox_RID_77313
DSSTox_GSID_24166
Maleic anhydride (briquette)
Maleic anhydride treated BSA
Maleic anhydride-1-[13C]
5-17-11-00055 (Beilstein Handbook Reference)
(Z)-butanedioic acid anhydride
Maleimide-Related Compound 11
BDBM7812
CHEMBL374159
DTXSID7024166
Maleic anhydride, powder, 95%
NSC9568
CS-Z0016
NSC-9568
ZINC8100874
Tox21_200406
ANW-15923
NSC137651
NSC137652
NSC137653
SBB060268
STL197476
AKOS000121041
MCULE-5322674641
NE10402
NSC-137651
NSC-137652
NSC-137653
UN 2215
NCGC00248595-01
NCGC00257960-01
BP-20394
CAS-108-31-6
Maleic anhydride, for synthesis, 99.0%
Maleic anhydride [UN2215] [Corrosive]
FT-0628122
FT-0670909
FT-0693473
M 188
M0005
Maleic anhydride treated bovine serum albumin
ST51046487
Maleic anhydride, puriss., >=99.0% (NT)
9607-EP2270113A1
9607-EP2272935A1
9607-EP2275418A1
9607-EP2277565A2
9607-EP2277566A2
9607-EP2277567A1
9607-EP2277568A2
9607-EP2277569A2
9607-EP2277570A2
9607-EP2277878A1
9607-EP2289894A2
9607-EP2289896A1
9607-EP2292280A1
9607-EP2292593A2
9607-EP2295407A1
9607-EP2298736A1
9607-EP2298743A1
9607-EP2301924A1
9607-EP2305808A1
9607-EP2308828A2
9607-EP2308833A2
9607-EP2308857A1
9607-EP2308872A1
9607-EP2311804A2
9607-EP2316829A1
9607-EP2371805A1
9607-EP2371831A1
9607-EP2377610A2
9607-EP2377611A2
Maleic anhydride, SAJ first grade, >=98.0%
Maleic anhydride treated non-fat dry milk powder
A801842
Q412377
J-002092
J-521668
F0001-0164
Maleic anhydride, 95% (may contain up to 5% maleic acid)
108-31-6 [RN]
2,5-Furandion [German] [ACD/IUPAC Name]
2,5-Furandione [ACD/Index Name] [ACD/IUPAC Name]
2,5-Furanedione [French] [ACD/IUPAC Name]
203-571-6 [EINECS]
5-17-11-00055 (Beilstein Handbook Reference) [Beilstein]
cis-butenedioic anhydride
Furan-2,5-dione
Maleic acid anhydride
Maleic anhydride [Wiki]
Maleinanhydrid [Czech]
184288-31-1 [RN]
2,5-dihydrofuran-2,5-dione
2,5-Oxoledione
224641-13-8 [RN]
224641-15-0 [RN]
224641-16-1 [RN]
24937-72-2 [RN]
33225-51-3 [RN]
Anhydrid kyseliny maleinove [Czech]
Dihydro-2,5-dioxofuran
furan-2,5-quinone
Lytron 810
Lytron 820
M 188
MALEIC ANHYDRIDE (2,3-13C2)
Maleic anhydride (briquette)
Maleic Anhydride (MAN)
Maleic anhydride-d2
maleicanhydride
Maleinanhydrid
MALIC ANHYDRIDE
TOXILIC ANHYDRIDE
顺丁烯二酸酐 [Chinese]

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