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Molecular formula: (NH4)2HPO4
Molecular weight: 132.06
Properties: white crystal or powder with ammoniacal odor. Relative density is 1.619 and melting point is 155℃. Soluble in water and insoluble in alcohol.
Uses: as analytical reagent, PH buffer agent, precipitant, corrosion inhibitor, and etc.
Standard:
| Specifications/item |
AR
|
CP
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Food grade
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Industrial high purity
|
|
Assay[(NH4)2HPO4] /%
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≥99.0
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≥98.0
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97.0~102.0
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Nitrogen (N) assay
20.0
|
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PH value (50g/L,25℃)
|
7.8~8.2
|
7.8~8.2
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7.8~8.2
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7.8~8.2
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Clarity test
|
Qualified
|
Qualified
|
－
|
－
|
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Water insoluble matter/%
|
≤0.005
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≤0.01
|
－
|
－
|
|
Chloride(Cl) /%
|
≤0.000 5
|
≤0.004
|
≤0.03
|
－
|
|
Sulfur compound(SO4) /%
|
≤0.005
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≤0.01
|
－
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－
|
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Nitrate(NO3) /%
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≤0.000 5
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≤0.001
|
－
|
－
|
|
Sodium (Na) /%
|
≤0.01
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≤0.02
|
－
|
－
|
|
Potassium (K) /%
|
≤0.005
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≤0.01
|
－
|
－
|
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Iron (Fe) /%
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≤0.000 5
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≤0.002
|
－
|
－
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Arsenic (As) /%
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≤0.000 5
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≤0.002
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≤0.000 4
|
－
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Heavy metal (Pb) /%
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≤0.000 5
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≤0.001
|
≤0.002
|
－
|
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Phosphorus pentoxide (P2O5) /%
|
－
|
－
|
－
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≤46.0
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Moisture/%
|
－
|
－
|
－
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≤0.2
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Packing: Plastic woven bag lined with plastic bag, kraft bag, carton or fiber drum, net weight is 25kg.
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