Product Documents
Hydrofluorosilicic Acid 23% (HFS)
Technical · 23%
Hydrofluorosilicic Acid 23% (HFS) (CAS 16961-83-4) is a chemical product supplied by Alliance Chemical in the Aqueous Acids category, available as Technical, 23%. For transport it is classified as UN1778, DOT hazard class 8, and packing group II. Its GHS signal word is Danger. Documentation includes a safety data sheet (SDS), a technical data sheet (TDS), and a certificate of analysis (COA), available below and published from Alliance Chemical's canonical product data.
Corrosive
Irritant / harmful
How does Hydrofluorosilicic Acid 23% (HFS) ship?
Alliance Chemical ships Hydrofluorosilicic Acid 23% (HFS) at 23% as UN1778, hazard class 8, packing group II. Transport classification depends on concentration, so this is the classification for this grade specifically — not a generic value for the pure compound.
| Field | Value | Governing regulation |
|---|---|---|
| UN Number | UN1778 | DOT 49 CFR 172.101 Hazardous Materials Table |
| DOT Hazard Class | 8 | DOT 49 CFR 172.101 Hazardous Materials Table |
| Packing Group | II | DOT 49 CFR 172.101 Hazardous Materials Table |
| GHS Signal Word | Danger | OSHA HCS 29 CFR 1910.1200 Appendix C |
Values are published only when Alliance Chemical's canonical record is authoritative or cross-verified. The safety data sheet carries the full provenance chain, including section 14 transport information.
About these documents
Alliance Chemical publishes these documents from its canonical product data. Chemical identity, hazard classification, and physical properties are sourced from named authorities (DOT 49 CFR, OSHA, ECHA, PubChem) and internal laboratory records — each value carries per-field provenance and a last-reviewed date. A Certificate of Analysis with lot-specific results ships with every order.
Last reviewed 2026-07-17 by Andre Taki, DOT Hazmat Specialist.