Hydrogen chloride CAS 7647-01-0
Hydrogen chloride (CAS 7647-01-0, formula ClH) is an industrial chemical with a molecular weight of about 36.46 g/mol. Its harmonised GHS classification carries the signal word Danger.
Identifiers
- Name
- Hydrogen chloride
- CAS number
- 7647-01-0
- CLP index number
- 017-002-00-2
- EC number
- 231-595-7
- Molecular formula
- ClH
- Molecular weight
- 36.46 g/mol
- Also known as
- Hydrochloric acid, Muriatic acid, Spirit of salt, Chlorhydric acid, Hydrochloric acid solution, HCl
GHS classification
Harmonised classification under the CLP Regulation (Annex VI), index number 017-002-00-2. Signal word: Danger.
| Hazard class | Code | Statement |
|---|---|---|
| Skin corrosion/irritation | H314 | Causes severe skin burns and eye damage. |
| Acute toxicity, inhalation | H331 | Toxic if inhaled. |
Pictograms
- GHS04 Gas cylinder
- GHS05 Corrosion
- GHS06 Skull and crossbones
Suppliers may classify additional hazards from their own data, so a supplier's Safety Data Sheet can list more than the harmonised entry.
Source: Regulation (EC) No 1272/2008, Annex VI, retrieved 2026-10-10. Confirm against the current consolidated text and your supplier's SDS before relying on it.
Creating a Safety Data Sheet for a product containing Hydrogen chloride
If Hydrogen chloride is an ingredient, record its CAS number and concentration in Section 3 and use it in the mixture classification that drives Section 2 and the label.
How to write a Safety Data Sheet · GHS mixture classification
Prepare SDS and labels in SDS Desk
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Start free trialFrequently asked questions
- What is the CAS number of Hydrogen chloride?
- The CAS Registry Number of Hydrogen chloride is 7647-01-0.
- What is the chemical formula of Hydrogen chloride?
- Hydrogen chloride has the formula ClH and a molecular weight of about 36.46 g/mol.
- What are the GHS hazards of Hydrogen chloride?
- Hydrogen chloride carries the signal word Danger. Its harmonised hazard statements are H314, H331: Causes severe skin burns and eye damage.; Toxic if inhaled..
- Which GHS pictograms apply to Hydrogen chloride?
- GHS04 (Gas cylinder), GHS05 (Corrosion), GHS06 (Skull and crossbones).
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Information is provided for general reference and is not a substitute for a supplier's Safety Data Sheet or professional advice. See our disclaimer.