Phosphoric acid CAS 7664-38-2
Phosphoric acid (CAS 7664-38-2, formula H3O4P) is an industrial chemical with a molecular weight of about 98 g/mol. Its harmonised GHS classification carries the signal word Danger.
Identifiers
- Name
- Phosphoric acid
- CAS number
- 7664-38-2
- CLP index number
- 015-011-00-6
- EC number
- 231-633-2
- Molecular formula
- H3O4P
- Molecular weight
- 98 g/mol
- Also known as
- Orthophosphoric acid, o-Phosphoric acid, White phosphoric acid, Trihydroxyphosphine oxide, Phosphoric acid 85%
GHS classification
Harmonised classification under the CLP Regulation (Annex VI), index number 015-011-00-6. Signal word: Danger.
| Hazard class | Code | Statement |
|---|---|---|
| Skin corrosion/irritation | H314 | Causes severe skin burns and eye damage. |
Pictograms
- GHS05 Corrosion
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 Phosphoric acid
If Phosphoric 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 Phosphoric 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 Phosphoric acid?
- The CAS Registry Number of Phosphoric acid is 7664-38-2.
- What is the chemical formula of Phosphoric acid?
- Phosphoric acid has the formula H3O4P and a molecular weight of about 98 g/mol.
- What are the GHS hazards of Phosphoric acid?
- Phosphoric acid carries the signal word Danger. Its harmonised hazard statements are H314: Causes severe skin burns and eye damage..
- Which GHS pictograms apply to Phosphoric acid?
- GHS05 (Corrosion).
Other chemicals
- Acetic acid CAS 64-19-7
- Acetone CAS 67-64-1
- Ammonia CAS 7664-41-7
- Benzene CAS 71-43-2
Information is provided for general reference and is not a substitute for a supplier's Safety Data Sheet or professional advice. See our disclaimer.