Nitric acid CAS 7697-37-2
Nitric acid (CAS 7697-37-2, formula HNO3) is an industrial chemical with a molecular weight of about 63.01 g/mol. Its harmonised GHS classification carries the signal word Danger.
Identifiers
- Name
- Nitric acid
- CAS number
- 7697-37-2
- CLP index number
- 007-004-00-1
- EC number
- 231-714-2
- Molecular formula
- HNO3
- Molecular weight
- 63.01 g/mol
- Also known as
- Aqua fortis, Azotic acid, Fuming nitric acid, Niter acid, Hydrogen nitrate, Red fuming nitric acid
GHS classification
Harmonised classification under the CLP Regulation (Annex VI), index number 007-004-00-1. Signal word: Danger.
| Hazard class | Code | Statement |
|---|---|---|
| Oxidizing liquids; Oxidizing solids | H272 | May intensify fire; oxidiser. |
| Skin corrosion/irritation | H314 | Causes severe skin burns and eye damage. |
| Acute toxicity, inhalation | H330 | Fatal if inhaled. |
Pictograms
- GHS03 Flame over circle
- GHS05 Corrosion
- GHS06 Skull and crossbones
The harmonised entry for this substance applies at defined concentration ranges, and specific concentration limits and notes in Annex VI can change the classification of solutions and mixtures.
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 Nitric acid
If Nitric acid 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
Add Nitric acid by name or CAS number, build your product composition and export a reviewed 16-section SDS. 7-day free trial.
Start free trialFrequently asked questions
- What is the CAS number of Nitric acid?
- The CAS Registry Number of Nitric acid is 7697-37-2.
- What is the chemical formula of Nitric acid?
- Nitric acid has the formula HNO3 and a molecular weight of about 63.01 g/mol.
- What are the GHS hazards of Nitric acid?
- Nitric acid carries the signal word Danger. Its harmonised hazard statements are H272, H314, H330: May intensify fire; oxidiser.; Causes severe skin burns and eye damage.; Fatal if inhaled..
- Which GHS pictograms apply to Nitric acid?
- GHS03 (Flame over circle), 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.