tetra-Sodium Pyro Phosphate (Decahydrate) AR 500Gram

PRODUCT CODE 645835
SYNONYMS (Tetra- Sodium pyrophosphate decahydrate.)
C.I. NO. --
CASR NO. (13472-36-1)
ATOMIC OR MOLECULAR FORMULA Na4O7P2.10H2O
ATOMIC OR MOLECULAR WEIGHT 446.06
PROPERTIES Melting point 79°C. Insoluble in alcohol and ammonia.

PARAMETER LIMIT
Description Colourless or white crystals / crystalline powder.
Solubility 5% solution in water is clear and colourless.
pH (of 5% solution in water) 9.5 - 10.5
Assay (Acidimetric) 99.0 - 103.0%

MAXIMUM LIMIT OF IMPURITIES
Insoluble matter 0.01%
Chloride (Cl) 0.001%
Total Nitrogen (N) 0.001%
Orthophosphate (PO4) 0.1%
Sulphate (SO4) 0.005%
Arsenic (As) 0.0001%
Iron (Fe) 0.0005%
Heavy metals ( as Pb) 0.0005%
Potassium (K) 0.005%