Potassium hydroxide

from source

HKO · 56.106 g/mol

KOH · caustic potash · lye · potassium hydrate

What is Potassium hydroxide?

Caustic potash, the base that makes liquid and soft soaps where sodium hydroxide makes hard bars. It is also the electrolyte in alkaline batteries. from source

CategoryEveryday chemistry

LeaderboardsBiggest Deadliest

Fig. 1 · 2D structure RDKit

SMILES[OH-].[K+]

Relative acute toxicity from source

Animal study data · LD50

Reported LD50: 273 mg/kg · moderately toxic
Species: rat
Route: oral

An LD50 describes acute toxicity under experimental conditions and is not a safe or dangerous dose for a person.

Toxicity & hazards

Toxicity · LD50

273 mg/kg · moderately toxic · LD50 rat oral from source

2 more reported values

363 mg/kgLD50 · oral · rat
1,230 mg/kgLD50 · oral · rat

DangerCorrosiveToxicIrritantHealth hazardH290, H301, H302, H304, H314, H318, H370, H372, H402from source

Sources & methodology

PubChem CID: 14797
Wikidata: Q132298
Structure: PubChem → RDKit
LD50: PubChem
Data refreshed: September 13, 2026

How MoleculeFinder sources and labels its data