Citric Acid Anhydrous, CAA

Product Overview

Citric Acid (anhydrous) — chemical formula C6H8O7, CAS 77-92-9 — is a naturally occurring organic acid (dominant in lemons and limes) supplied as white, crystalline citric acid crystals / powdered citric acid. It functions as an acidulant, pH buffer, antioxidant and chelating agent across food, pharmaceutical, cosmetic and industrial applications. Available as crystallized citric acid, powdered citric acid, or in bulk citric acid 25kg bags for industrial users.

CITRIC ACID, white crystalline solid, decomposes at higher temperatures, sp gr 1.542. Citric acid is soluble in H2O or alcohol and slightly soluble in ether. The compound is a tribasic acid, forming mono-, di-, and tri- series of salts and esters.It occurs in large amounts is citrus fruits, and is used widely in industry as an acidifier, as a flavoring and chelating agent. pKa values are 5.21, 4.28 and 2.92 at 25 °C (extrapolated to zero ionic strength).
Citric acid is a good buffering agent for solutions between about pH 2 and pH 8. It is popular in many buffers in many techniques, electrophoresis (SSC Buffer #), to stop reactions, for biopurifications, crystallography... In biological systems around pH 7, the two species present are the citrate ion and mono-hydrogen citrate ion. the pH of a 1 mM solution of citric acid will be about 3.2.

Key Specifications & Physical Data

Melting Point	153-159 °C (lit.)
Boiling Point	310 °C (decomp)
Bulk Density	560kg/m3
Density	1.67 g/cm3 at 20 °C
Vapor Density	7.26 (vs air)
Vapor Pressure	<0.1 hPa (20 °C)
Refractive Index	1.493~1.509
FEMA	2306 | CITRIC ACID
Fp	100 °C
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