Ammonia CAS 7664-41-7
Ammonia (CAS 7664-41-7, formula H3N) is an industrial chemical with a molecular weight of about 17.03 g/mol. Its harmonised GHS classification carries the signal word Danger.
Identifiers
- Name
- Ammonia
- CAS number
- 7664-41-7
- CLP index number
- 007-001-00-5
- EC number
- 231-635-3
- Molecular formula
- H3N
- Molecular weight
- 17.03 g/mol
- Also known as
- Anhydrous ammonia, Ammonia gas, Spirit of hartshorn, Azane, NH3
GHS classification
Harmonised classification under the CLP Regulation (Annex VI), index number 007-001-00-5. Signal word: Danger.
| Hazard class | Code | Statement |
|---|---|---|
| Flammable gases | H221 | Flammable gas. |
| Skin corrosion/irritation | H314 | Causes severe skin burns and eye damage. |
| Acute toxicity, inhalation | H331 | Toxic if inhaled. |
| Hazardous to the aquatic environment, acute hazard | H400 | Very toxic to aquatic life. |
Pictograms
- GHS04 Gas cylinder
- GHS05 Corrosion
- GHS06 Skull and crossbones
- GHS09 Environment
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 Ammonia
If Ammonia 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
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Start free trialFrequently asked questions
- What is the CAS number of Ammonia?
- The CAS Registry Number of Ammonia is 7664-41-7.
- What is the chemical formula of Ammonia?
- Ammonia has the formula H3N and a molecular weight of about 17.03 g/mol.
- What are the GHS hazards of Ammonia?
- Ammonia carries the signal word Danger. Its harmonised hazard statements are H221, H314, H331, H400: Flammable gas.; Causes severe skin burns and eye damage.; Toxic if inhaled.; Very toxic to aquatic life..
- Which GHS pictograms apply to Ammonia?
- GHS04 (Gas cylinder), GHS05 (Corrosion), GHS06 (Skull and crossbones), GHS09 (Environment).
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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.