Product Overview

Potassium Hydroxide Flakes 85% Extra Pure (CAS No. 1310-58-3) is potassium hydroxide supplied in flake form at the stated assay. Potassium hydroxide is a strong inorganic base that dissociates extensively in aqueous solution and readily neutralises acids, promotes hydrolysis and saponification reactions, and absorbs atmospheric carbon dioxide to form carbonate species. The 85% assay does not establish the identity or proportion of individual constituents outside the stated potassium hydroxide content.

The Extra Pure grade and flake form are suited to routine laboratory work requiring convenient bulk handling and dissolution of a strong potassium base. Flakes are useful for preparation of alkaline solutions and preparative reactions while retaining the same chemical identity as powder and pellet forms; their physical form, rather than a different chemical composition, distinguishes this catalogue entry.

Typical Applications

• Preparation of strongly alkaline laboratory solutions.
• Neutralisation of acids and adjustment of reaction-media alkalinity.
• Saponification and base-promoted hydrolysis reactions.
• Preparative organic and inorganic synthesis requiring potassium hydroxide.
• Alkaline digestion or treatment of suitable laboratory materials.
• General reagent and formulation preparation requiring a potassium base.

Common Synonyms

• Caustic potash
• Potash lye
• Potassium hydrate
• Potassium hydroxide
• Caustic potassium

Storage Conditions

Keep tightly closed and minimise exposure to humid air because potassium hydroxide is strongly hygroscopic and deliquescent. Limit atmospheric exposure during weighing because moisture uptake and absorption of carbon dioxide can progressively alter effective hydroxide content and introduce carbonate.