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Sodium Thiosulphate Anhydrous |
SODIUM THIOSULPHATE ANHYDROUS (Na2S2O3),
M.W. : 158 g/mol.11 CAS No. 7772-98-7, Sodium Thyposulphite |
SPECIFICATION |
Physical Appearance |
White free flowing powder
Free from lunps and externals visibal impurities. |
Appearance of Solution |
A 20% solution in distilled water should be clear and colourless |
Assay as Na2S2O3 |
97.0% Min. W/W. |
PH of 10% Solution |
6.5 to 8.5 at room temp. |
Sulphide as Na2S |
0.002% Max. |
Insolubels mater as Ca, Mg and NH4OH |
0.4 % Max. |
Iron as Fe |
0.005 % Max. |
Heavy Metals as Pb |
0.005% Max. |
Packing |
25kg / 50kg / 50Lb |
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