Potassium hydroxide CAS 1310-58-3
Potassium hydroxide (CAS 1310-58-3, formula HKO) is an industrial chemical with a molecular weight of about 56.11 g/mol. Its harmonised GHS classification carries the signal word Danger.
Identifiers
- Name
- Potassium hydroxide
- CAS number
- 1310-58-3
- CLP index number
- 019-002-00-8
- EC number
- 215-181-3
- Molecular formula
- HKO
- Molecular weight
- 56.11 g/mol
- Also known as
- Caustic potash, Potassium hydrate, Lye, KOH, Potash lye, Caustic potash flakes
GHS classification
Harmonised classification under the CLP Regulation (Annex VI), index number 019-002-00-8. Signal word: Danger.
| Hazard class | Code | Statement |
|---|---|---|
| Acute toxicity, oral | H302 | Harmful if swallowed. |
| Skin corrosion/irritation | H314 | Causes severe skin burns and eye damage. |
Pictograms
- GHS05 Corrosion
- GHS07 Exclamation mark
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 Potassium hydroxide
If Potassium hydroxide 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 Potassium hydroxide?
- The CAS Registry Number of Potassium hydroxide is 1310-58-3.
- What is the chemical formula of Potassium hydroxide?
- Potassium hydroxide has the formula HKO and a molecular weight of about 56.11 g/mol.
- What are the GHS hazards of Potassium hydroxide?
- Potassium hydroxide carries the signal word Danger. Its harmonised hazard statements are H302, H314: Harmful if swallowed.; Causes severe skin burns and eye damage..
- Which GHS pictograms apply to Potassium hydroxide?
- GHS05 (Corrosion), GHS07 (Exclamation mark).
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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.