Industrial chemicals · Taylor, TXCertificate of AnalysisSample Certificate of Analysis
Sodium Metabisulfite - Technical Grade
Technical Grade
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Sample COA. Lot-specific COAs ship with each order.
Specifications
| Parameter | Specification | Typical Result | Test Method |
|---|---|---|---|
| Assay | 99.5 – 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 ppm | 2 ppm | ICP |
| Lead (Pb) | ≤ 5 ppm | — | ICP-MS |
| Mercury (Hg) | ≤ 0.1 ppm | — | ICP-MS |
| Moisture | ≤ 0.04 % | — | Karl Fischer |
| pH | 4 – 5 | 4.5 | pH Meter |
| Residue/Non-volatile | ≤ 1 % | 0.1 % | Residue on Ignition |
| Selenium (Se) | ≤ 5 ppm | — | ICP-MS |
| Sulfite | ≤ 2 % | — | Per specification |
Generated . Values are representative of typical production lots and reflect the published specification range. Lot-specific COAs are provided with every shipment.