Industrial chemicals · Taylor, TX
Certificate of Analysis

Sample Certificate of Analysis

Sodium Thiosulfate

Certificate #
TYP-SODIUMTHIOSU
Lot Number
TYPICAL SAMPLE
Test Date
Category
Inorganic Salts / Slurries (F)
CAS Number
7772-98-7
Formula
Na2O3S2
Computed Assay
100.00%(100 − Σ impurities)
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Sample COA. Lot-specific COAs ship with each order.

2D chemical structure of Sodium Thiosulfate
Structure · PubChem
Last reviewed 2026-05-20.

COA · Answer summary

Typical certificate of analysis for Sodium Thiosulfate. Lot-specific results ship with every order.

Assay (computed)
100.00%

Specifications

ParameterSpecificationTypical ResultTest Method
Assay99.5 – 100.5 %100 %Titration/Gravimetric
Appearance/Odor——Visual Inspection
Chloride (Cl)≤ 0.02 %0.01 %ICP
Heavy Metals (as Pb)≤ 5 ppm—ICP-MS (as Pb)
Insoluble Matter≤ 0.01 %0.01 %Gravimetric
Insolubles≤ 0.01 %0.01 %Filtration
Iron≤ 10 ppm3 ppmICP
Loss on Drying32 – 37 %—Loss on Drying
pH6 – 9.038.6pH Meter
Sulfate≤ 0.02 %0.01 %ICP-MS

Generated . Published by Alliance Chemical from first-party canonical product data. Our authority is hands-on chemical handling, DOT/GHS-compliant shipping, and government-registered distribution — not bench chemistry. Values are representative of typical production lots and reflect the published specification range. Lot-specific COAs are provided with every shipment.