Industrial chemicals · Taylor, TX
Certificate of Analysis

Sample Certificate of Analysis

Sodium Metabisulfite - Technical Grade

Technical Grade

Certificate #
TYP-SODIUMMETABI
Lot Number
TYPICAL SAMPLE
Test Date
Category
Inorganic Salts / Slurries (F)
CAS Number
7681-57-4
Formula
Na2O5S2
Computed Assay
99.90%(100 − Σ impurities)
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Sample COA. Lot-specific COAs ship with each order.

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

COA · Answer summary

Typical certificate of analysis for Sodium Metabisulfite - Technical Grade. Lot-specific results ship with every order.

Assay (computed)
99.90%
Grade
Technical Grade

Specifications

ParameterSpecificationTypical ResultTest Method
Assay99.5 – 100.5 %99.9 %Titration/Gravimetric
Appearance/Odor——Visual Inspection
Arsenic (As)≤ 0.4 ppm—ICP-MS
Chloride (Cl)≤ 0.05 %—ICP
Heavy Metals (as Pb)≤ 10 ppm—ICP-MS (as Pb)
Insoluble Matter≤ 0.01 %—Gravimetric
Iron≤ 10 ppm2 ppmICP
Lead (Pb)≤ 5 ppm—ICP-MS
Mercury (Hg)≤ 0.1 ppm—ICP-MS
Moisture≤ 0.04 %—Karl Fischer
pH4 – 54.5pH Meter
Residue/Non-volatile≤ 1 %0.1 %Residue on Ignition
Selenium (Se)≤ 5 ppm—ICP-MS
Sulfite≤ 2 %—Per specification

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.