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Chemical reagent
Potassium dihydrogen phosphate

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

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 standardGB/T 1274-2011


Test items

Specification

AR grade

CP grade

Appearance

Colorless crystal

Colorless crystal

Assay

99.5%

99.0%

pH

4.2~4.5

4.2~4.5

Appearance of solution

Conform

Conform

Water insoluble

0.002%

0.005%

Loss on dry

0.2%

0.3%

Chloride

0.001%

0.005%

Sulfate

0.003%

0.005%

Total nitrogen

0.001%

0.002%

Arsenic

0.0005%

0.002%

Sodium

0.02%

0.05%

Iron

0.001%

0.005%

Heavy metals

0.001%

0.005%

Storage

    Store in a cool, dry and well ventilated place. Keep away from incompatible substances. Keep container closed.


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