Sodio solfato anidro pentaidrato, 1 kg

Sodio tiosolfato pentaidrato EPR
Na2S2O3·5H2O
M.W: 248,21 CAS: 10102-17-7 EC: 231-867-5 TARIC: 28323000
P: P102-P202

Appearance ≤ Large, colourless crystals or coarse crystalline powder
Assay 99 – 100.5%
Identity ≤ Passes test
Appearance of solution ≤ Dissolve 10.0 g in 50 ml of distilled water R, add 1 ml of 0.1 M sodium hydroxide and dilute to 100 ml with the same solvent. Clear & colourless
pH (10% solution in water) 6.0 – 8.4
Chloride (Cl–) ≤ 0.05%
Sulfates and Sulfites (SO4) ≤ 0.2%
Sulphide (S) ≤ Passes test%
Heavy metals (Pb) ≤ 0.001%
Calcium (Ca) ≤ Passes test%
Water 32.0 – 37.0%