Industrial chemicals · Taylor, TXCertificate of Analysis
Sample Certificate of Analysis
Hydrofluorosilicic Acid 23% ACS
ACS Grade · 23%
Sample COA. Contact Alliance Chemical with your lot number to request a lot-specific COA.
- CAS number
- 16961-83-4
- Structure
Structure · PubChem - Grade
- ACS Grade · 23%
- Assay specification
- 23% min
- Answer summary
Sample specification reference for Hydrofluorosilicic Acid 23% ACS. Source-record results are reference values, not measurements for your lot.
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
Specifications
| Parameter | Specification | Source reference result | Test Method |
|---|---|---|---|
| Assay (H2SiF6) | 23% min | 23.01 % | — |
| Appearance | Colorless liquid | Passes test | — |
| Specific gravity @ 20 C | 1.185 - 1.205 | 1.195 | Hydrometer / pycnometer, ASTM D891 |
| Free hydrofluoric acid (HF) | 0.5 % maximum | 0.12 % | Fluoride ion-selective electrode / NaOH titration |
| Residue after ignition (as sulfate) | 0.05 % maximum | 0.0055 % | Gravimetric, ignition at 800 C |
| Chloride (Cl) | 50 ppm maximum | 1.0 ppm | Turbidimetric (AgNO3) / ion chromatography |
| Sulfate (SO4) | 100 ppm maximum | 5.6 ppm | Turbidimetric (BaCl2) / ion chromatography |
| Heavy metals (as Pb) | 5 ppm maximum | 0.36 ppm | ICP-OES / ACS sulfide comparison |
| Iron (Fe) | 10 ppm maximum | 0.59 ppm | ICP-OES / 1,10-phenanthroline colorimetric |
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.
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