Product Documents

Hydrofluorosilicic Acid 23% (HFS)

23%

CAS Number
16961-83-4
Category
Aqueous Acids

Hydrofluorosilicic Acid 23% (HFS) (CAS 16961-83-4) is a chemical product supplied by Alliance Chemical in the Aqueous Acids category, available as 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.

CLASS 8 · UN1778Danger
Alliance Chemical One-gallon HDPE jug of Hydrofluorosilicic Acid 23% (HFS) UN1778 classification, and hazard warning symbols
2D chemical structure of Hydrofluorosilicic Acid 23% (HFS)
Structure · PubChem
SDSSafety Data Sheet — hazards, handling, first aid, and transport.TDSTechnical Data Sheet — identity, properties, and specifications.COACertificate of Analysis — typical analytical results.
Compare all 2 grades of Hydrofluorosilicic Acid →
Download document packet (ZIP)SDS, technical data, and a sample certificate of analysis in one file.

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 2026-05-20.