Sodium Thiosulfate 5-hydrate (Reag. USP) for analysis, ACS

Sodium Thiosulfate 5-hydrate (Reag. USP) for analysis, ACS
Content: 25 KGM
Physical Description:
solid
Quality Name: for analysis, ACS
Specification: Assay (Iodom.): 99.5-101.0%
pH of 5% solution: 6.0-8.4

?maximum limit of impurities:
Insoluble matter in H2O: 0.005 %
Chloride (Cl): 0.02%
Nitrogen compounds (as N): 0.002%
Sulfide (S): 0.0001 %
Sulfate and sulfite (as SO4): 0.1%
Heavy metals (as Pb): 0.0005%
Ca: 0.002 %
Cd: 0.0005 %
Co: 0.0005 %
Cr: 0.0005 %
Cu: 0.0005 %
Fe: 0.0005 %
K: 0.005 %
Mg: 0.001 %
Mn: 0.0005 %
Ni: 0.0005 %
Pb: 0.0005 %
Zn: 0.0005 %