Potassium hydroxide

CAS 1310-58-3HKO56.106 g/mol

Potassium hydroxide is an alkali metal hydroxide.

IUPAC: potassium hydroxide

Potassium hydroxide molecular structure

PubChem

Physical & Chemical Properties

Physical and chemical properties
Melting Point	680 °F approximately (NTP, 1992)
Boiling Point	greater than 266 °F at 760 mmHg (USCG, 1999)
Density	1.45 to 1.50 at 68 °F (USCG, 1999)
Solubility	107 g/100 cc at 59 °F (NTP, 1992)
Vapor Pressure	1 mmHg at 1326 °F ; 5 mmHg at 1497 °F (NTP, 1992)
pH	Strongly alkaline (1 % solution)
Appearance	Potassium hydroxide, solution appears as an clear aqueous solution. Corrosive to metals and tissue. Noncombustible. Used in chemical manufacturing, petroleum refining, cleaning compounds.

Data: PubChem · Last updated: 4/20/2026

GHS Classification

No GHS classification data available.

Classification data is sourced from ECHA.

Regulatory Compliance

TSCA

Toxic Substances Control Act (US)

Listed

note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory

SVHC

Substances of Very High Concern (EU)

Not Listed

REACH

Registration, Evaluation, Authorisation and Restriction of Chemicals (EU)

Registered

tonnage band: 100,000-1,000,000 tonnes/year

FDA GRAS

Generally Recognized as Safe (US FDA)

Not Listed

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Global Trade Intelligence

No trade flow data available for this chemical.

HS Code(s): 2815

Data: UN Comtrade

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