Benzoic Acid

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art: N/A
Formula C7H6O2
Molar mass 122.123 g/mol
CAS number 65-85-0
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Description

Benzoic acid is a colourless crystalline solid and the simplest aromatic carboxylic acid. Benzoic acid occurs naturally free and bound as benzoic acid esters in many plant and animal species. Appreciable amounts have been found in most berries (around 0. 05%). Cranberries contain as much as 300-1300 mg free benzoic acid per kg fruit. Benzoic acid is a fungistatic compound that is widely used as a food preservative. It often is conjugated to glycine in the liver and excreted as hippuric acid. Benzoic acid is a byproduct of phenylalanine metabolism in bacteria. It is also produced when gut bacteria process polyphenols (from ingested fruits or beverages).

Formula
C7H6O2
Molar mass
122.123 g/mol
CAS Number
65-85-0
Density
1.320 g/cm3 at 20°C (68°F)
Purity/Grade
≥99.5% (ACS Reagent)
Apearance
White crystalline
Melting point/freezing point
121 – 125°C (250 – 257 °F) – lit.
Initial boiling point and boiling range
249°C (480°F) – lit.
pH
2.5 – 3.5 at 20 °C (68 °F)
Flash point
121°C (250°F) – closed cup
Water solubility
 2.9 g/l at 25°C (77°F)
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