Characteristics: White crystalline powder. Easy to absorb moisture. Long time in the air it can absorb 2~7mol water. Heat to 240 degrees Celsius it will decompposed into sodium pyrophosphate. Dissolve in about 8 parts of water, more soluble in hot water, insoluble in ethanol,the 1% aqueous solution at 25 degrees C to pH 9.1.. DLM (minimal lethal dose) ( rat, intraperitoneal ) 1000mg/kg.
Purpose:Analytical reagent. Buffering agents. softener. Fireproofing agent of printing and dyeing industry. Fabric weighting agent.
Specifications:
Identification should be positive
Alkalinity pH should be 9.1 to 9.4
The clarity and color of the solution should meet the requirements
Chloride should not exceed 0.001%
Sulfate should not exceed 0.01%
Carbonate should meet the requirements
Insoluble matter in water, residual residue should not exceed 10mg
Reducing substances should comply with regulations
Loss on drying weight loss should be 55.0% to 64.0%
Iron salt should not exceed 0.0005%
Heavy metals should not exceed 5 PPM
Arsenic salt should not exceed 0.0002%
Content (Na2HPO4, based on dry product)
                      Should not be less than 99.0%"
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