SDS Vault Safety Data Sheet Reference

Potassium Hydroxide (Caustic Potash)

CAS: 1310-58-3 Category: Cleaners ⚠ DANGER
Also known as: KOH, Caustic potash, Potassium lye, Drain cleaner

Quick Facts

CAS Number1310-58-3
Signal WordDANGER
GHS Hazard Classescorrosive
NFPA RatingHealth: 3 / Flammability: 0 / Reactivity: 1
Common NamesKOH, Caustic potash, Potassium lye, Drain cleaner
PubChem CID14797

Hazard Summary

⚠ DANGER: Strong alkali similar to sodium hydroxide. Causes severe, progressive burns. Generates significant heat when dissolved in water. Used in drain cleaners and battery electrolyte.

GHS Hazard Pictograms

⚗ Corrosive

Hazard Statements (H-codes)

H290 – May be corrosive to metals
H302 – Harmful if swallowed
H314 – Causes severe skin burns and eye damage

Precautionary Statements (P-codes)

P260 – Do not breathe dust
P303+P361+P353 – IF ON SKIN: Remove clothing, rinse with water
P305+P351+P338 – IF IN EYES: Rinse continuously for 15 min; seek immediate medical attention

First Aid Measures (Section 4)

👁 Eye Contact
Flush immediately and continuously for at least 30 minutes. Seek emergency care — alkali penetrates deeply.
🖐 Skin Contact
Remove contaminated clothing. Flush with large amounts of water for 20 minutes. Seek medical attention.
🫁 Inhalation
Move to fresh air. Dust or mist is severely irritating. Seek medical attention.
🫦 Ingestion
Do NOT induce vomiting. Rinse mouth. Give water. Call 911 and Poison Control (1-800-222-1222).

Storage & Handling

🔒 Storage & Handling: Store in sealed containers away from moisture, acids, and metals. Secondary containment.

PPE Requirements

Face shield over chemical goggles
Neoprene or nitrile gloves
Chemical-resistant apron and boots
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