1.DAP manufacturer 2. formula: (NH4)2HPO4 3. NPK=21-53-00. 4. hot phosphoric acid process

Chemical formula: (NH4)2HPO4

Molecular weight: 132.06

Properties: Colorless clarity rhombic crystal or white powder. The relative density is 2.338. It is soluble in water and insoluble in ethanol, acetone and ammonia. It decompounds at 155 centigrade. It is easy to lose ammonium and becomes ammonium dihydrogen phosphate in the air. React with ammonia and form triammonium phosphate.

Specification:

items	unit	standard
		grade A	grade B
(NH4)2HPO4	%≥	98.00	98.00
P2O5	%≥	53.00	53.00
N	%≥	21.00	21.00
pH(1% solution)	--	7.8--8.5
Fluorid (F)	%≤	-	0.001
As	%≤	-	0.0003
Heavy metal (Pb)	%≤	-	0.001
Water insolubles	%≤	0.1	0.1
Moisture	%≤	0.2	0.2

DAP 98%min (NPK=21-53-00)