Diammonium phosphate, DAP

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Diammonium hydrogen phosphate (DAP)

Chemical formula: (NH4)2HPO4Molecular weight: 132.06Standard executed: Q/7089476401-1998Properties: White granular crystal and relative density is 1.619, melting point is 155°C, easy to dissolve in water and not dissolve in alcohol, PH value of 1% water solution is 8.0. It will lose gradually ammonia to become ammonium dibasic phosphate.Applications: Mainly used for the fire retardant of wood, paper and textile, and for fireproofing dope additive.Package and storage: Plastic-woven sack with polythene inner bag, net weight per bag is 25kg, 50kg and 100kg. keep in dry and windy conditions.Technical Specifications: 

No.	standard name	industrial grade	food grade
1	Main content(as (NH4)2HPO4)%≥	99.0	99.0
2	Phosphorus pent-oxide(as P2O5)%≥	53.0	53.0
3	Nitrogen(as N)%≥	20.8	20.8
4	PH value	7.8-8.2	7.8-8.2
5	Moisture%≤	0.2	0.2
6	Heavy metal(as Pb)%≤		0.001
7	Arsenic(As)%≤		0.0003
8	Fluoride(as F)%≤		0.005
9	Water insoluble %≤	0.10	0.10

 

Diammonium phosphate, DAP