Diammonium phosphate (DAP)
Chemical Formula: (NH4)2HPO4
Molecular weight: 132.0
Standard: Q/7089476401-1998
Properties: white granular Crystal, Relative density 1.619, Melting point 155°C, PH value of 1% Aq. solution 8.0. .
Uses: Mainly used as flame retardant of wood, paper and fabric; Also used as additive of fire retardant paint, or used to produce plate and drugs. As fermentation agent, nourishment agent in the food industry. Used as a a chlorine-free N+P compound fertilizer. It contains totally 74% fertilizer elements (N+P2O5), used as a basic raw material for N, P and K compound fertilizer.
|
No. |
Index name |
Industrial grade |
Food Grade |
|
1 |
Main assay (as (NH4)2HPO4) %≥ |
99.0 |
99.0 |
|
2 |
Phosphorus pentoxide (as P2O5) %≥ |
53.0 |
53.0 |
|
3 |
N%≥ |
20.8 |
20.8 |
|
4 |
PH value |
7.8-8.2 |
7.8-8.2 |
|
5 |
Moisture%≤ |
0.2 |
0.2 |
|
6 |
Heavy Metals (as Pb) %≤ |
0.001 |
|
|
7 |
As %≤ |
0.0003 |
|
|
8 |
Fluoride (as F) %≤ |
0.005 |
|
|
9 |
Water Insoluble Matter%≤ |
0.10 |
0.10 |