Product Overview

Citric Acid Anhydrous 99.5% AR (CAS No. 77-92-9) is an analytical-reagent form of water-free citric acid. Its triprotic acid behaviour permits preparation of citrate-buffer systems across method-appropriate conditions, while its multiple oxygen-donor sites provide complexing and masking action toward selected metal ions.

The AR grade is intended for conventional analytical chemistry, preparation of citrate reagents and laboratory quality-control procedures. It supports acid–base, complexation, masking and solution-conditioning, and many more analytical methods used in critical analysis in regular and QC laboratories.

Typical Applications

• Preparation of citrate-buffer and acid–citrate analytical solutions.
• pH adjustment of method-compatible aqueous reagent systems.
• Complexation and masking of selected metal ions in wet-chemical procedures.
• Preparation of citrate-containing working solutions for analytical method development.
• Investigation of metal–citrate equilibria and competitive complex formation.
• Laboratory quality-control procedures requiring analytical-reagent anhydrous citric acid.

Common Synonyms

• Citric Acid Anhydrous
• Anhydrous Citric Acid
• 2-Hydroxypropane-1,2,3-tricarboxylic Acid
• 2-Hydroxy-1,2,3-propanetricarboxylic Acid
• β-Hydroxytricarballylic Acid
• Acidum Citricum Anhydricum

Storage Conditions

Keep the container tightly closed under dry, clean conditions and protect from moisture, humid air and analytical contamination. Promptly reclose after sampling to preserve the anhydrous form and reagent cleanliness.