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Ammonium Phosphate Dibasic

Ammonium Phosphate Dibasic

Basic Information

CAS No.: 7783-28-0
Molecular Formula: H9N2O4P
Molecular Weight: 132.06

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Product Details

Ammonium phosphates include mono- and diammonium orthophosphates and ammonium polyphosphates. As discussed below, these are made directly by reaction anhydrous ammonia with orthophosphoric acid or superphosphoric acid. Both are dry crystalline materials with good handling properties.


Chemical Properties
PropertyValue

Melting point

155 °C (dec.)(lit.)

Density

1.203 g/mL at 25 °C

Bulk density

800-1000kg/m3

Vapor pressure

0.076Pa at 20℃

RTECS

TB9385000

Storage temp.

-20°C

Solubility

H2O: 1 M at 20 °C, clear, colorless

Form

Powder

Color

White

Specific Gravity

1.619

PH

7.6-8.2 (100g/l, H2O, 20℃)

Odor

wh. cryst. or powd., odorless, cooling salty taste

Water Solubility

58 g/ 100mL (10 ºC)

λmax

λ: 260 nm Amax: 0.065λ: 280 nm Amax: 0.065

Merck

14,542

Stability:

Stable. Incompatible with strong acids, strong bases, strong oxidizing agents.

InChIKey

MNNHAPBLZZVQHP-UHFFFAOYSA-N

LogP

-2.148 (est)

CAS DataBase Reference

7783-28-0(CAS DataBase Reference)

EPA Substance Registry System

Diammonium phosphate (7783-28-0)


Safety Information

PropertyValue
Hazard symbolsXi, Xn, N
Hazard class codes36/37/38-20/21/22-50
Safety descriptions26-36-61-37/39
UN dangerous goods numberUN 3465 6.1 / PGIII
WGK Germany1
F3
TSCATSCA listed
HS code31053000
Storage class11 - Combustible solids
Hazardous substances data7783-28-0 (Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: 6500 mg/kg
LD50 dermal Rabbit: >7950 mg/kg


Product Usage

Ammonium Phosphate Dibasic (DAP) is a versatile compound fertilizer containing both nitrogen and phosphorus, as well as a vital industrial additive. In agriculture, it is one of the most preferred high-concentration composite fertilizers; its water-soluble and physiologically neutral nature makes it suitable for most crops and soils, significantly promoting root development and early maturity. In the industrial sector, DAP serves as an excellent flame retardant, widely used in the fireproof treatment of wood, paper, and textiles, and in the formulation of dry powder extinguishing agents. Additionally, in the food industry, it is commonly used as a fermentation assistant and dough conditioner, while also playing a key role in printing plate making and pharmaceutical manufacturing.

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