DIAMMONIUM PHOSPHATE

Diammonium phosphate = DAP

CAS Number: 7783-28-0 
E number: E342(ii) (antioxidants, ...)
Chemical formula: (NH4)2HPO4
Molar mass: 132.06 g/mol

Diammonium phosphate (DAP) is the world’s most widely used phosphorus (P) fertilizer. 
Diammonium phosphate is made from two common constituents in the fertilizer industry and it is popular because of its relatively high nutrient content and its excellent physical properties.
Diammonium phosphate (DAP; IUPAC name diammonium hydrogen phosphate; chemical formula (NH4)2(HPO4) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid. 
Diammonium phosphate (DAP) is the world’s most widely used phosphorus fertilizer. 
Diammonium phosphate’s made from two common constituents in the fertilizer industry, and its relatively high nutrient content and excellent physical properties make it a popular choice in farming and other industries.
Diammonium phosphate is used as complex fertilizer for supply of 'N' and 'P2O5' nutrients.
Diammonium phosphate is mainly used in basal application of fertilizers due to slow releasing nature of DAP.

Uses of Diammonium phosphate:
DAP is used as a fertilizer.
When applied as plant food, it temporarily increases the soil pH, but over a long term the treated ground becomes more acidic than before upon nitrification of the ammonium. 
Diammonium phosphate is incompatible with alkaline chemicals because its ammonium ion is more likely to convert to ammonia in a high-pH environment. 
The average pH  of Diammonium phosphate in solution is 7.5–8.
The typical formulation of Diammonium phosphate is 18-46-0 (18% N, 46% P2O5, 0% K2O).

DAP can be used as a fire retardant. 
Diammonium phosphate lowers the combustion temperature of the material, decreases maximum weight loss rates, and causes an increase in the production of residue or char.
These are important effects in fighting wildfires as lowering the pyrolysis temperature and increasing the amount of char formed reduces that amount of available fuel and can lead to the formation of a firebreak. 
Diammonium phosphate is the largest component of some popular commercial firefighting products and is the ingredient in "fire retardant" cigarettes.

When applied as plant food, Diammonium phosphate temporarily increases the soil pH. 
DAP can be used as a fire retardant. 
Diammonium phosphate lowers the combustion temperature of the material, decreases maximum weight loss rates, and causes an increase in the production of residue or char. 
Diammonium phosphate is the largest component of some popular commercial firefighting products. 
DAP is also used as a yeast nutrient in winemaking and brewing mead; as an additive in some brands of purportedly as a nicotine enhancer; to prevent afterglow in matches, in purifying sugar; as a Flux for soldering tin, copper, zinc and brass; and to control precipitation of alkali-soluble and acid-insoluble colloidal dyes on wool.

Diammonium Phosphate, powder for use in winemaking. 
Diammonium phosphate is the basic nitrogen source in nearly all wine yeast nutrients. 
Diammonium phosphate can be used by itself or to augment some of the more expensive complete nutrients. 
At certain stages of fermentation Diammonium phosphate will help inhibit formation of reduced sulfur compounds. 
Diammonium phosphate is best if used early rather than later in the fermentation. 

DAP is also used: 
Diammonium phosphate is used as a yeast nutrient in winemaking and mead-making; 
Diammonium phosphate is usedas an additive in some brands of cigarettes purportedly as a nicotine enhancer; 
Diammonium phosphate is usedto prevent afterglow in matches, in purifying sugar; 
Diammonium phosphate is usedas a flux for soldering tin, copper, zinc and brass; 
Diammonium phosphate is used to control precipitation of alkali-soluble and acid-insoluble colloidal dyes on wool.

Properties of Diammonium phosphate:
Diammonium phosphate is a two-nutrient fertilizer. 
Diammonium phosphate contains 18% nitrogen (N) and 46% phosphorus (P) as P2O5. 
Since Diammonium phosphates nitrogen content is in ammonium (NH4) form, it is particularly effective in the first development stages of plants. 
When used as a base fertilizer, Diammonium phosphates nitrogen content may not be sufficient to provide plants’ need. 
Therefore, if diammonium phosphate is preferred as starter fertilizer, plants must be supported with other nitrogencontaining fertilizers in top dressed fertilization. 
Since Diammonium phosphates nitrogen content is in ammonium (NH4) form, it is easily retained by soil. 
So no nitrogen loss occurs because of washing as a result of excessive precipitation or excessive irrigation.

Agricultural Use of Diammonium phosphate:
As rest of the world, diammonium phosphate fertilizer is used as a phosphorous fertilizer in our country, too. 
As a plant nutrient, phosphorus is essential for root development during early growth stages and very important for energy metabolism. 
In case of not applying at sufficient depth or in sufficient rate, phosphorus deficiency arises in plants so dramatic decreases occur in yield and quality. 
In our webpage, you may achieve detailed information under title of “Fertilization Recommendations”.

Applications of Diammonium phosphate:
The effectiveness of diammonium phosphate fertilizer particularly in the calcareous soils with pH above 7.5 is higher than triple superphosphate (TSP). 
As Diammonium phosphate is the case with other phosphorous fertilizers, a portion of phosphorus existing in diammonium phosphate fertilizer combines with calcium (Ca) that is abundant in calcareous soils and becomes non-available for plants. 
However, Diammonium phosphate can transform again to useful form as a result of certain physicochemical processes in soils. 
Therefore, all phosphorous fertilizers including diammonium phosphate must be banded with special equipment instead of spreading. .

As the case for other compound fertilizers, diammonium phosphate is applied in advance of or during seeding and incorporated with soil considering the effective root deepness. 
Applying Diammonium phosphate after seed germination will not have any effect on phosphorus nutrition of plants. 
The reason of this is that phosphorus retention by soil particles and as a result of this, hindered horizontal movement. 
Phosphorus can reach up to a depth of only 5-6 cm with precipitation. 
Therefore, in diammonium phosphate application 5-6 cm below the seeding depth must be aimed. 

Solid diammonium phosphate shows a dissociation pressure of ammonia as given by the following expression and equation:
(NH4)2HPO4(s) ⇌ NH3(g) + (NH4)H2PO4(s)
At 100 °C, the dissociation pressure of diammonium phosphate is approximately 5 mmHg.

Natural occurrence of Diammonium phosphate:
The compound occurs in the nature as the exceedingly rare mineral phosphammite.
The related dihydrogen compound occurs as the mineral biphosphammite.
Both are related to guano deposits.

According to the diammonium phosphate MSDS from CF Industries, Inc., decomposition starts as low as 70 °C: "Hazardous Decomposition Products: Gradually loses ammonia when exposed to air at room temperature. 
Decomposes to ammonia and monoammonium phosphate at around 70 °C (158 °F). 
At 155 °C (311 °F), DAP emits phosphorus oxides, nitrogen oxides and ammonia."

CAS Number: 7783-28-0  
CHEBI: 63051
ChemSpider: 22946 
ECHA InfoCard: 100.029.079  
E number: E342(ii) (antioxidants, ...)
PubChem CID: 24540
UNII: 10LGE70FSU  
CompTox Dashboard (EPA): DTXSID6029705

Diammonium phosphate (DAP) is produced from industrial phosphoric acid that contains large amounts of anionic and cationic impurities (Co, Cu, Fe, Mn, Mo, Ni, Zn, F, As, Al, Hg, Pb and Cd). 
Consequently all those impurities will be found in DAP. 
However, the industrial DAP obtained can be used as fertilizers, but cannot be used for some industrial application like pharmaceutics and cosmetics. 
After purification, the price of DAP is three times more expensive than the same product before purification. 
The procedure for purification of industrial DAP is a recrystallization, by using several mixtures of solvents. 
The physicochemical characterization of this fertilizer upstream and downstream from the purification, through spectroscopic analyses and chemical analyses, shows that recrystallization eliminates impurities. 
Purified DAP was obtained, the physicochemical properties of which are comparable to those of the pure commercial DAP (Fisher).

Chemical formula: (NH4)2HPO4
Molar mass: 132.06 g/mol
Appearance: white powder
Density: 1.619 g/cm3
Melting point: 155 °C (311 °F; 428 K) decomposes
Solubility in water: 
57.5 g/100 mL (10 °C)
106.7 g/100 mL (100 °C)
Solubility: insoluble in alcohol, acetone and liquid ammonia
Refractive index (nD): 1.52

INFORMATION about Diammonium phosphate:
Because of Diammonium phosphates nutrient composition, DAP is also referred to as 18-46-0 in the trade. 
Diammonium Phosphate (DAP) is a highly water-soluble nitrogen phosphate used in a number of multi- component fertiliser mixtures as well as in directly applied compound fertilisers. 
Aside from Monoammonium Phosphate (MAP), Diammonium phosphate is the world’s most commonly used phosphate fertiliser, with annual production reaching almost 50 million mt. 
Phosphates are mined in the form of rock phosphate. 
Phosphates react with sulphuric acid to produce phosphoric acid, which in turn reacts with ammonia. 
This process converts the poorly water-soluble rock phosphate into a water-soluble phosphate fertiliser that is easily assimilated by plants. 
DAP is a grey or beige-grey granular substance. 
DAP is sometimes impregnated with a dust-suppressant oil, giving Diammonium phosphate a dark brown colouring.

FEATURES of Diammonium phosphate:
• High analysis source of phosphorus.
• DAP releases free ammonium. Nitrogen in the ammonium form resists leaching and is a slower release form of nitrogen.
• The free ammonium gives a higher pH reaction immediately around the granule.
• The low cost of nitrogen in DAP makes it a cost effective source of nitrogen if phosphorus is also required

DAP (Diammonium Phosphate) fertilizer has a composition of 18% N, 46% P2O5 and is a two-nutrient compound fertilizer. 
In addition to being used as a source of phosphorus fertilizer, the nitrogen in Diammonium phosphates content is in the form of ammonium (NH4 +), so Diammonium phosphate is easily retained in the soil and there is no nitrogen loss by washing from the soil due to excessive rainfall or irrigation. 
Diammonium phosphate plays an important role in root development and energy metabolism especially in the first development period of plants. 
Diammonium phosphate is efficient in terms of solubility and vegetative nutrition and is used as the most preferred underground (base) fertilizer by farmers. 
DAP fertilizer, like all base fertilizers, can be used before sowing or with sowing. 
Diammonium phosphate should be applied and mixed into the soil. 
Since the phosphorus contained in DAP fertilizer is kept in the soil and cannot move to the depths of the soil, Diammonium phosphates application after germination does not show Diammonium phosphates effect.

Production of Diammonium phosphate:
Ammonium phosphate fertilizers first became available in the 1960s, and DAP rapidly became the most popular in this class of products. 
Diammonium phosphate’s formulated in a controlled reaction of phosphoric acid with ammonia, where the hot slurry is then cooled, granulated and sieved. DAP handles and stores well. 
The standard nutrient grade of DAP is relatively high, at 18-46-0, so fertilizer products with lower nutrient content may not be labeled DAP.
The inputs required to produce one ton of DAP fertilizer are approximately 1.5 to 2 tons of phosphate rock, 0.4 tons of sulfur (S) to dissolve the rock, and 0.2 tons of ammonia. 
Changes in the supply or price of any of these inputs will impact DAP prices and availability. 
The high nutrient content of DAP helps reduce handling, freight and application costs. 
DAP is produced in many locations in the world and is a widely traded fertilizer commodity.

DAP fertilizer is an excellent source of P and nitrogen (N) for plant nutrition. 
Diammonium phosphate’s highly soluble and thus dissolves quickly in soil to release plant-available phosphate and ammonium. 
A notable property of DAP is the alkaline pH that develops around the dissolving granule.
As dissolving DAP granules release ammonium, the seedlings and plant roots nearest the volatile ammonia can be harmed. 
This potential damage more commonly occurs when the soil pH is greater than 7, a condition that often exists around the dissolving DAP granule. 
To prevent such damage, users should avoid placing high concentrations of DAP near germinating seeds.
The ammonium present in DAP is an excellent N source and will be gradually converted to nitrate by soil bacteria, resulting in a subsequent drop in pH. 
Therefore, the rise in soil pH surrounding DAP granules is a temporary effect. 
This initial rise in soil pH neighboring DAP can influence the micro-site reactions of phosphate and soil organic matter.

What is Diammonium phosphate?
Ammonium phosphate dibasic ((NH4)2HPO4), also known as diammonium phosphate and diammonium hydrogen phosphate, is a water-soluble ammonium phosphate salt that is produced when ammonia reacts with phosphoric acid. 
Ammonium phosphate dibasic has various industrial uses, including as a yeast nutrient in winemaking and to aid in cheese culturing, as a phosphate source in fertilizers, and as a component of commercial fire-fighting materials. 
In pharmacy, Diammonium phosphate has been as an antirheumatic.

Diammonium phosphate Management practices
Differences in the initial chemical reaction between various commercial P fertilizers in soil become minor over time (within weeks or months) and are minimal as far as plant nutrition is concerned. 
Most field comparisons between DAP and monoammonium phosphate (MAP) show only minor or no differences in plant growth and yield due to P source with proper management.

Non-agricultural uses
DAP also acts as a fire retardant. 
For example, a mixture of DAP and other ingredients can be spread in advance of a fire to prevent a forest from burning. 
Diammonium phosphate then becomes a nutrient source after the danger of fire has passed. 
DAP is used in various industrial processes, too, such as metal finishing.
And, Diammonium phosphate’s commonly added to wine to sustain yeast fermentation and to milk to produce cheese cultures.

What is DAP?
DAP is a water-soluble inorganic phosphate salt, mostly used in the baking industry as a synergistic ingredient in breadmaking. 
Incorporation of of the salt is helpful for:
-Providing phosphorus and nitrogen, vital nutrients for yeast cells
-Enhancing growth of yeast cells
-Helping yeasts to absorb other micronutrients
-Speeding up fermentation reactions (enhancing metabolic production, e.g., carbon dioxide and alcohol)
-Controlling pH of sponge doughs, due to its buffer nature
-Strengthening and conditioning dough mixtures

Commonly known as DAP, Diammonium Phosphate is manufactured by reacting 1 mole of phosphoric acid (produced from mined phosphate rock) with 2 moles of ammonia; the resulting slurry is solidified into a granular form.
Di-ammonium hydrogen phosphate (DAP) is a water-soluble ammonium phosphate. 
Diammonium phosphate is the most common source of yeast supplement at present, possibly because Diammonium phosphate is inexpensive and easy to use. 
Diammonium phosphate is a yeast nutrient, resulting in stronger and more viable yeasts that in many cases work faster.

Diammonium phosphate Properties:
Diammonium phosphate is water soluble
Diammonium phosphate is varying shades of brown

Diammonium phosphate Advantages:
Provides a source of phosphorus in phosphate form, accompanied by a higher nitrogen content than MAP.
Nitrogen is in ammonium form, which is readily-available for plant uptake.
Higher solubility than MAP

Product form : Substance
Substance name : (DAP) Diammonium phosphate
Product code : DAP, DAPFR,DAPOS, DAPLG
CAS No. : 7783-28-0
Formula : (NH4)2HPO4
Synonyms : Ammonium phosphate, dibasic / Diammonium hydrogenorthophosphate / Phosphoric acid, diammonium salt / Diammonium hydrogenphosphate / Ammonium phosphate dibasic / Diammonium hydrogen phosphate / Diammonium hydrogen orthophosphate / Phosphoric acid, ammonium salt (1:2) / DIAMMONIUM PHOSPHATE / DAP

Chemical name: Diammonium phosphate
Manufacture: Ammonia gas is combined with phosphoric acid in a ratio of 1:1, granulated, dried and screened.

Diammonium phosphate Uses:
One of the major cropping fertilisers used in Australia as a source of both phosphorus and nitrogen. 
The high phosphorus content makes Diammonium phosphate a true high analysis fertiliser. 
DAP and blends of DAP are used on a range of crops in broad-acre farming, cereals, sugar cane, sowing pastures, dairy pastures, fodder crops and also in horticultural crops; for example, vegetables and tree crops.

Grade Standard: Industrial Grade
State Of Matter: Crystals
Physical State: Crystals
Form Of Chemicals: Granules
Color: White Crystal
Density: 1.619 G/Cm3
PH Value: 7.8-8.0
Molar Mass: 132.06 G/Mol
Assay: 95 - 98 %
Formula: (NH4) H2PO4
Purity: 95 - 98 %
Melting Point: Up To 155 Degree C

Diammonium phosphate (DAP) is the world’s most widely used phosphorus fertilizer. 
Diammonium phosphate’s made from two common constituents in the fertilizer industry, and its relatively high nutrient content and excellent physical properties make it a popular choice in farming and other industries.

Ammonium phosphate fertilizers first became available in the 1960s and DAP rapidly became the most popular in this class of products. 
Diammonium phosphate is formulated in a controlled reaction of phosphoric acid with ammonia, where the hot slurry is then cooled, granulated, and sieved. 
DAP has excellent handling and storage properties.

DAP fertilizer is an excellent source of P and nitrogen (N) for plant nutrition. 
Diammonium phosphate is highly soluble and thus dissolves quickly in soil to release plant-available phosphate and ammonium. 
The ammonium present in DAP is an excellent N source and will be gradually converted to nitrate by soil bacteria.

DAP and DAP blends are used on a range of crops in broad-acre farming, cereals, sugar cane, sowing pastures, dairy pastures, fodder crops and also in horticultural crops; for example, vegetables and tree crops.
One of the key differences between MAP and DAP is their nitrogen content. 
DAP may be more suitable where higher percentage of N is required. 
Additionally DAP is more salty at about 34 compared to 30 in MAP but at similar product rates the difference is negligible.

Inorganic nitrogen source
Diammonium phosphate (DAP) should only be used to supplement severely deficient juices/musts. 
DAP provides inorganic nitrogen and should only be used if necessary and always in combination with complex nutrients.

Diammonium phosphate Usages
Suspend DAP in water or juice/must and mix well before adding, especially during fermentation to avoid CO2 release and overflowing of vessel.

Purpose and possibilities of usage: 
Compound, concentrated fertilizer containing nitrogen and phosphorus. 
Diammonium phosphate is used for the main plant fertilization before sowing field, garden, kitchen garden and flower plants in all types of soil. 
Diammonium phosphate is not recommended to spread diammonium phosphate together with seeds in rows. 
Diammonium phosphate is used to fertilize plants locally by inserting next to the seed row.

Storage
Dated expiration. 
Store in a cool and dry environment at 18°C(65°F). 
Once opened, keep tightly sealed and dry.

DAP is the abbreviation for di-ammonium phosphate, a widely used fertiliser that is manufactured overseas and imported into New Zealand.
DAP is made by reacting phosphoric acid with ammonia under controlled conditions. 
The resulting material is granulated and sieved to produce a consistent product that has many applications in pastoral and arable farming.

Diammonium phosphate Product Benefits
-An ideal starter fertiliser for a wide range of crops
-Suitable for use as a general maintenance or capital fertiliser in pastoral settings
-Provides water-soluble phosphate, which is immediately available for plant uptake
-Formulated as a standalone fertiliser, but may be blended with selected products
-May be broadcast or drilled

Diammonium Phosphate
Diammonium phosphate is an inorganic compound, and a salt of phosphoric acid. 
Phosphate and organic phosphate are esters of phosphoric acid. 
Phosphate is a natural resource that is found under the surface of the earth, where Diammonium phosphate is exploited to use the phosphor in multiple agricultural and industrial activities.

DAP (diammonium phosphate) is a major source of nitrogen for low-malt or sugar-rich mashes and washes. 
Recommended to add the dose in stages during the first half of fermentation. 
DAP stimulates fermentation rate, so if too much is added at once, the yeast may ferment too fast and too hot.

Production Method:
Ammonia is imported from Arab and foreign countries by ships, where Diammonium phosphate is pumped through a pipe with a diameter of 14 inches to a tank with a storage capacity of 30,000 tons, and a second tank with a storage capacity of 10,000. 
Ammonia temperature in the tanks is continuously kept at (-33 oC) using special compressors.
Ammonia is pumped to the reactor, where Diammonium phosphate reacts with concentrated phosphoric acid to produce slurry, which is pumped to a fertilizer granulator to be mixed with the fertilizer returns. 
Additional ammonia is added to the granulator to reach the required mixtures. 
Using the hot gases produced by the burning fuel oil, Fertilizer is then dried, so Diammonium phosphates moisture content doesn’t exceed 1.5%. 
Fertilizer is conveyed to sieves to get the required size, cooled down in a machine similar to the dryer, and then sent to the storage silos.

Diammonium phosphate Usages:
The fertilizer is used either directly or as an input to produce other fertilizers such as liquid and suspended compound fertilizers.

Application of DAP
-Suitable for all kinds of crop demand for nitrogen and phosphorus, is a kind of water-soluble organic compound fertilizer, Diammonium phosphate is one of the main high concentration of phosphate &compound fertilizer varieties.
-The ideal base fertilizer for multiple compound fertilizer and BB fertilizer.
-Diammonium phosphate is effective to increase the output of crops and economic crops, such as rice, wheat, corn, sorghum, cotton, melon and fruit, vegetables, etc.
-To improve soilit. 
Widely used in red soil, yellow soil, brown soil, yellow tide soil, black earth, brown soil, purple soil, white soil, etc. 
Especially suitable for the northwest, north China, northeast and other dry areas.

Diammonium Phosphate (DAP) from Diamond Fertilisers is a compound fertiliser used widely in the agricultural industry. 
Diammonium phosphate is more commonly referred to as DAP. 
DAP is produced combining ammonia phosphoric acid with ammonia. 
Diammonium phosphate contains 18% nitrogen and 46% phosphorus pentoxide. 
Diammonium phosphate is a granular fertiliser which can be applied direct or used as part of a blend.

Storage & Handling
Does tend to take up moisture, both in storage and in the field.
Storage in a bulk shed is the preferred storage method. 
Covering with a tarp may reduce any moist air uptake.
The use of augers may damage the fertiliser and increase any handling problems.
Do not leave exposed to moist air.
Either fill or empty (completely), the drill or air-seeder fertiliser box overnight.
Cover seeding equipment with a tarp.
Raise the equipment tynes from the soil to stop moisture moving up the tubes.

Diammonium Phosphate (DAP) is used to stimulate yeast growth especially as used as an addition to yeast starters and wines lacking in natural nutrients such as white wines or as a yeast nutrient for mead brewing.
Diammonium Phosphate is a salt used to invigorate yeast and add vital nutrients to yeast starters and wines; such as wines and meads. 
Today often used to prevent the build up of carbonic acid in hard seltzer.

This product is used as a fermentation activator and is reserved for fermentation operations. 
Diammonium phosphate makes available ammonium ions, which can be directly assimilated by the yeast. 
Excess phosphates can lead to iron breakdown.
Statutory provisions limit the amount of ammonium that can be added.

Diammonium Phosphate is a yeast nutrient that acts as a good source of nitrogen and also aids in the reduction of sulfur. 
Diammonium phosphate works best if used early in fermentation. 
This nutrient is highly recommended to supplement the use of Champagne yeast in order to minimize potential geranium type odors and flavors.
Diammonium Phosphate DAP 18-46-0 fertilizer is an excellent source of P and nitrogen (N) for plant nutrition. 
Diammonium phosphate is highly soluble and thus dissolves quickly in soil to release plant-available phosphate and ammonium. 
A notable property of Diammonium Phosphate DAP 18-46-0 is the alkaline pH that develops around the dissolving granule.

Diammonium Phosphate is a yeast nutrient that acts as a good source of nitrogen and also aids in the reduction of sulfur. 
Diammonium phosphate works best if used early in fermentation. 
This nutrient is highly recommended to supplement the use of Champagne yeast in order to minimize potential geranium type odors and flavors.

Crop Segments: All
Features: High analysis nitrogen and phosphorus contained in every granule.
Quality & Handling: Nominal 2-4mm size granule, free flowing product. 
Bulk density 0.9 tonnes per cubic metre.
Blending: Can be blended with most products and trace elements.

Di-ammonium Phosphate popularly known as DAP is a preferred fertilizer in India because Diammonium phosphate contains both Nitrogen and Phosphorus which are primary macro-nutrients and part of 18 essential plant nutrients.
DAP (NH4)2HPO4: Fertilizer grade DAP Contains 18% Nitrogen and 46% Phosphorus (P2O5).
DAP is manufactured by reacting Ammonia with Phosphoric acid under controlled conditions in fertilizer plants.

Diammonium phosphate or DAP for short is a widely used Yeast Nutrient in Brewing, Cider, Mead, Winemaking and Hard Seltzer.  
DAP delivers valuable nitrogen and phosphate to yeast cells. 
Wort is generally rich in nitrogen, but a little supplementation can help high-gravity beers complete fermentation. 
Phosphates also help ensure smooth fermentation of worts that contain large portions of non-malt adjuncts.

DAP (diammonium phosphate) is a major source of nitrogen for low-malt or sugar-rich mashes and washes. 
Recommended to add the dose in stages during the first half of fermentation. 
DAP stimulates fermentation rate, so if too much is added at once, the yeast may ferment too fast and too hot.

IUPAC name
diammonium hydrogen phosphate
Other names
ammonium monohydrogen phosphate, ammonium hydrogen phosphate, ammonium phosphate dibasic
Diammonium phosphate [Wiki]
ammonium phosphate [NF]
10LGE70FSU
231-987-8 [EINECS]
7783-28-0 [RN]
Ammonium hydrogen phosphate (2:1:1)
Ammonium hydrogenphosphate
Ammonium phosphate dibasic
Ammonium phosphate, dibasic
Diammonium hydrogen phosphate [ACD/IUPAC Name]
Diammonium hydrogenphosphate
di-Ammonium hydrogenphosphate (sec)
Diammoniumhydrogenphosphat [German] [ACD/IUPAC Name]
dibasicammonium phosphate
Hydrogénophosphate de diammonium [French] [ACD/IUPAC Name]
MFCD00010891 [MDL number]
(NH4)2HPO4
[7783-28-0]
10124-31-9 [RN]
18-46-0
7722-76-1 [RN]
ACS, 98.0% min
AGN-PC-071DRG
AKOS015902404
Akoustan A
Ammonium biphosphate, Ammonium phosphate dibasic, Diammonium hydrogen phosphate, Fyrex
Ammonium hydrogen orthophosphate
AMMONIUM HYDROGEN PHOSPHATE
Ammonium hydrogen phosphate solution
Ammonium monohydrogen orthophosphate
ammonium monohydrogen phosphate
Ammonium orthophosphate dibasic
Ammonium phosphate (NF)
Ammonium phosphate [USAN] [USAN]
ammonium phosphate, di-
Ammonium phosphate, secondary
Ammoniumhydrogenphosphate
AxEa paragraph signthorni section sign
AxEaCa paragraph signthorni section sign
AxEaCai section sign
Coaltrol LPA 445
DAP, DAPLG
diamine phosphate
Diammonium acid phosphate
Diammonium hydrogen orthophosphate
di-Ammonium hydrogen phosphate
Diammonium hydrogen phosphate ((NH4)2HPO4)
diammonium hydrogen phosphate; diazanium hydrogen phosphate
Diammonium hydrogenorthophosphate
Diammonium monohydrogen phosphate
Diammonium orthophosphate
di-ammonium phosphate
Diammonium Phosphate Food Grade
Diammonium phosphate solution
DIAMMONIUM PHOSPHATE|PHOSPHORIC ACID DIAMINE
diammoniumhydrogenphosphate
diazanium and hydron and phosphate
diazanium hydrogen phosphate
diazanium;hydrogen phosphate
Dibasic ammonium phosphate
EINECS 231-987-8
Fyrex
Hydrogen diammonium phosphate
I14-19729
K2 (phosphate)
Pelor [Wiki]
Phos-Chek 202A
Phos-Chek 259
phosphoric acid diamine
Phosphoric acid diammonium salt
Phosphoric acid, diammonium salt
UNII:10LGE70FSU
UNII-10LGE70FSU
W0009
磷酸氢二铵 [Chinese]

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