Ammonium dihydrogen phosphate is a white crystal.
In agriculture, ammonium dihydrogen phosphate (MAP) is a kind of water-soluble, quick-acting compound fertilizer. Its ratio of available phosphorus (P2O5) to total nitrogen (N) is about 5.44:1, which is a high-concentration phosphorus compound fertilizer. One of the main varieties. As a raw material for production, it is also an essential raw material for the production of ternary compound fertilizer, BB fertilizer, etc., and is indispensable.
Industrially, it is mainly used as a fire retardant for fertilizers and wood, paper, and fabrics.
Item
|
Agriculture Grade
|
Item
|
Industry Grade
|
N+P2O5
|
73
|
(NH4)h2PO4
|
98.5
|
N
|
11.8
|
P2O5
|
60.8
|
P2O5
|
60.8
|
N
|
11.8
|
Water
|
0.50
|
As
|
0.005
|
unwater soluble
|
0.10
|
F
|
0.02
|
PH
|
4.5-5.5
|
SO4
|
0.9
|
As
|
0.0050
|
Water
|
0.5
|
Cd
|
0.0010
|
water unsoluble
|
0.1
|
Pb
|
0.0200
|
PH
|
4.2-4.8
|
Cr
|
0.0500
|
|
|
Hg
|
0.0005
|