CERTIFICATE OF ANALYSIS
Product Name SODIUM METABISULPHITE Extra Pure CAS Number 7681-57-4
Molecular Formula Na 2 S 2 O 5 Catalogue No. AL4195
Molecular Weight 190.1 Batch Number
Manufacturing Date December-2020 Expire Date November-2025

TYPE OF TEST

STANDARD

OBSERVED
Description
Assay (Iodom.)(Na2S2O5)
Assay (Iodom.) (As SO2)
pH (5% water)
Appearance of solution
Insoluble matter in HO2
Chloride (Cl)
Thiosulphate (S2O3)
Heavy metals (as Pb)
Arsenic (As)
Lead (Pb)
Iron (Fe)
Residual solvents (Ph.Eur./USP)
White crystalline powder
96.5 – 100.0%
65.0 – 67.4%
3.5 - 5.0
Passes test
<0.025%
<0.02%
<0.05%
<0.002%
<0.0003%
<0.001%
<0.002%
Passes test
White crystalline powder
97.1%
65.52%
4
Passes test
0.01%
<0.02%
0.032%
0.001%
0.0002%
<0.001%
<0.002%
Passes test
Result: The above product complies with EP grade

Tested By
Hitesh Kunjathur

Analysed By
Preeti Rane