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Molecular formula: NH4H2PO4

Molecular weight: 115.03

Properties:Colorless clarity foursquare crystal. The relative density is 1.803 and melting point is 190 centigrade. It is easily soluble in water and slightly soluble in alcohol, insoluble in acetone. It is stability in the air, and decompounds only a little at 100 centigrade. It loses ammonia and water, and becomes ammonium metaphosphate and phosphoric acid exceeding 190 centigrade.

Specification: (reference standard)

items	unit	standard
		grade A	grade B
NH4H2PO4	%≥	98.00	99.00
P2O5	%≥	61.00	61.00
N	%≥	12.00	12.00
pH(1% solution)	--	4.2--4.8
Fluorid (F)	%≤	--	0.001
As	%≤	--	0.0003
Heavy metal (Pb)	%≤	--	0.001
Water insolubles	%≤	0.1	0.1
Moisture	%≤	0.2	0.2

mono ammonium phosphate 98%min- MAP