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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
		technical grade	low  arseni grade
(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

dimmonium phosphate DAP 98%min crystal