Potassium Hydroxide

Potassium Hydroxide

CAS Number:1310‑58‑3

Synonyms:Potassium hydroxide; Caustic potash; Lye; Potassia

Chemical Formula:KOH

Molecular Weight: 56.11 g/mol

Product Introduction

A white, deliquescent solid commonly available as pellets, powder, or flakes. It’s a strong inorganic base and versatile reagent used in soap and detergent production, biodiesel catalysis, pH regulation, laboratory titrations, and chemical synthesis.

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Physical & Chemical Properties

Property Value
Appearance White deliquescent pellets/powder
Odor Odorless
Density @ 20 °C ~2.044–2.12 g/cm³
Melting Point 360–380 °C
Boiling Point ~1,320 °C
Solubility (water @25 °C) ~121 g/100 mL (increases with temperature)
Soluble in Alcohol, glycerol; insoluble in ether
Vapor Pressure ~1 mm Hg @719 °C
Purity (ACS reagent) ≥85% typical; impurities ≤0.001%

Applications

  • Industrial base:soap, detergent, cleaning agents
  • Chemical reagent:saponification, biodiesel production, pH control, titrations
  • Analytical reagent:chromatography eluents, buffer solutions
  • Food/pharma:permitted uses under controlled conditions

Safety Notes

  • Highly corrosive; causes severe burns. Hygroscopic and reacts with CO₂ in air. GHS H314. Use gloves, goggles, and fume hood; store sealed and dry. Avoid acids and moisture.

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