Product Overview

Potassium Hydroxide Pellets 85% AR (CAS No. 1310-58-3) is a pelletised form of the strong inorganic base potassium hydroxide. Dissolution provides highly alkaline solutions suitable for neutralisation, precipitation, digestion and numerous conventional analytical operations. Because solid potassium hydroxide rapidly interacts with atmospheric water and carbon dioxide, weighed material and prepared solutions can change composition if left exposed to air.

The AR grade is positioned for conventional wet chemistry, preparation of alkaline analytical reagents, laboratory QC and titrimetric work in which potassium hydroxide solutions are subsequently standardised as required.

Typical Applications

• Preparation of alkaline titrants that are subsequently standardised by the applicable analytical procedure.
• Acid neutralisation and conventional acid–base titrimetry.
• Precipitation of metal hydroxides in wet-chemical procedures.
• Alkaline digestion, hydrolysis and sample-treatment operations.
• Preparation of analytical reagents requiring potassium hydroxide.
• Laboratory QC and pH-adjustment procedures requiring a strong potassium base.

Common Synonyms

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

Storage Conditions

Keep tightly closed and minimise exposure to both humidity and atmospheric carbon dioxide. For analytical use, rapid dispensing and prompt resealing are important because moisture uptake and carbonate formation can change the effective hydroxide concentration and therefore affect subsequently prepared solutions.