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Product name
Potassium dihydrogen phosphate
Specification
Reagent grade
Molecular formula
KH2PO4
CAS
7778-77-0
H.S. CODE
2835240000
Molecular weight
136.09
Appearance
Colorless crystal
Package
25KG Woven bags or fiber drums
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Property：
Colorless sifang crystals or white crystalloid powder. The relative density 2.338. Melting point 252.6 ℃. Soluble in water (90 ℃ for improve g / 100ml canister water), become acidic aqueous solution, 1% linsuanerqingjia solution pH value is 4.6. Not soluble in alcohol. Have ChaoXie sex. Heating and 400 ℃ melted and transparent liquid, after cooling curing is not transparent glass shape partial potassium phosphate.
Application:
Analytics reagents, such as configuration standard solution, buffer a PH. Also used in the pharmaceutical industry, piezoelectric element and electric optical components production.
Test standard：GB/T 1274-2011
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Test items |
Specification |
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AR grade |
CP grade |
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Appearance |
Colorless crystal |
Colorless crystal |
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Assay |
≥99.5% |
≥99.0% |
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pH |
4.2~4.5 |
4.2~4.5 |
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Appearance of solution |
Conform |
Conform |
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Water insoluble |
≤0.002% |
≤0.005% |
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Loss on dry |
≤0.2% |
≤0.3% |
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Chloride |
≤0.001% |
≤0.005% |
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Sulfate |
≤0.003% |
≤0.005% |
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Total nitrogen |
≤0.001% |
≤0.002% |
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Arsenic |
≤0.0005% |
≤0.002% |
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Sodium |
≤0.02% |
≤0.05% |
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Iron |
≤0.001% |
≤0.005% |
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Heavy metals |
≤0.001% |
≤0.005% |
Storage：
Store in a cool, dry and well ventilated place. Keep away from incompatible substances. Keep container closed.
