Citric acid

September 3rd, 2008 by

Citric acid

IUPAC name
2-hydroxypropane-1,2,3-tricarboxylic acid
Other names
3-hydroxypentanedioic acid-3-carboxylic acid
Hydrogen citrate
Identifiers
CAS number
PubChem
311
ChemSpider ID
305
Properties
Molecular formula
C6H8O7
Molar mass
192.123 g/mol (anhydrous)
210.14 g/mol (monohydrate)
Appearance
crystalline white solid
Density
1.665 g/cm³
Melting point
153 °C
Boiling point
decomposes at 175 °C
Solubility in water
133 g/100 ml (20°C)
Acidity (pKa)
pKa1=3.15
pKa2=4.77
pKa3=6.40
Hazards
Main hazards
skin and eye irritant
Flash point
 ?°C
Related compounds
Related compounds
sodium citrate, calcium citrate
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox references
Citric [...]

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