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MAP
Ammonium dihydrogen phosphate (MAP)
Synonym: Diammonium hydrogen phosphate; Mono-Ammonium Phosphate
Chemical formula: NH4H2PO4
Molecular weight: 115.02
Standard executed: Q/7089476401-1998
Properties: White crystals, relative density is 1.803, melting point is 190°C, easy to dissolve in water and less to dissolve in alcohol, PH value of 1%water solution is 4.5.
Applications: Mainly used for the fireproofing agent of wood, paper and textile, and also for additive of fireproofing dopes, powder fireproofing agent ,leaven and nutrient in food industry, and high-efficiency compound fertilizer.
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
|
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1
|
Main content(as NH4H2PO4)%≥
|
99.0
|
99.0
|
|
2
|
Phosphorus pent-oxide(as P2O5)%≥
|
61.0
|
61.0
|
|
3
|
Nitrogen(as N)%≥
|
11.8
|
11.8
|
|
4
|
PH value
|
4.4-4.8
|
4.4-4.8
|
|
5
|
Moisture%≤
|
0.2
|
0.2
|
|
6
|
Heavy metal(as Pb)%≤
|
|
0.001
|
|
7
|
Arsenic(As)%≤
|
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0.0003
|
|
8
|
Fluoride(as F)%≤
|
|
0.005
|
|
9
|
Water insoluble %≤
|
0.10
|
0.10
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