Product Overview

Potassium Hydrogen Sulphate 99% AR (CAS No. 7646-93-7) is an acidic potassium sulphate containing hydrogen sulphate as the counter-anion. Its ability to generate acidic sulphate media and to function in bisulphate fusion chemistry makes it useful in conventional wet-chemical and sample-preparation procedures, particularly where strongly acidic conditions are required without introducing a different cation.

The AR grade is intended for analytical reagent preparation, inorganic sample treatment, acidic digestion or fusion steps and QC procedures where potassium hydrogen sulphate is specified. No primary-standard, certified-reference or trace-metal status is inferred from the stated 99% assay.

Typical Applications

• Bisulphate fusion of suitable inorganic samples before conventional analysis.
• Preparation of acidic sulphate reagent media.
• Analytical sample treatment requiring a solid acidic sulphate reagent.
• Acidification of wet-chemical reaction mixtures.
• Preparation of laboratory reagent solutions used in conventional inorganic analysis.
• QC and method-development procedures involving sulphate and hydrogen-sulphate chemistry.

Common Synonyms

• Potassium bisulphate
• Potassium bisulfate
• Potassium hydrogen sulfate
• Potassium hydrogensulfate
• Potassium acid sulphate
• Acid potassium sulphate

Storage Conditions

Keep tightly closed and protected from humid air to minimise moisture uptake by the hygroscopic salt. Avoid alkaline contamination during analytical use because partial neutralisation would alter reagent acidity and therefore its behaviour in sample-treatment procedures.