Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Sodium Bisulfite 25% Solution – Technical Grade (NaHSO3)
Technical · 25%
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
Last reviewed 2026-07-17 by Andre Taki, DOT Hazmat Specialist.
COA · Answer summary
Sample specification reference for Sodium Bisulfite 25% Solution – Technical Grade (NaHSO3). Source-record results are reference values, not measurements for your lot.
- Assay specification
- 23.5 - 26.5 % by wt
- Grade
- Technical
Specifications
| Parameter | Specification | Source reference result | Test Method |
|---|---|---|---|
| Assay (NaHSO3) | 23.5 - 26.5 % by wt | 25.0 % | — |
| pH | 3.8 - 5.0 | 4.4 | — |
| SO2 available | 14.6 - 16.1 % by wt | 15.35 % | — |
| Iron (Fe) | 9.4 ppm max | 1.1 ppm | — |
| Sodium sulfate | 2.2 % max | 0.53 % | — |
| Composition | 25 % sodium hydrogen sulfite in deionized water, by weight | Conforms | By formulation; confirmed by specific gravity |
Specification limits and source-record results are reproduced from the current product reference used by the TDS. This sample is not an issued certificate and does not identify a tested lot. Contact Alliance Chemical with the product and lot number for lot-specific documentation.