benzoic acid C7H6O2 (or C6H5COOH), is a colorless crystalline solid and the simplest aromatic carboxylic acid. The name derived from gum benzoin, which was for a long time the only source for benzoic acid. Its salts are used as a food preservative and benzoic acid is an important precursor for the synthesis of many other organic substances. The salts and esters of benzoic acid are known as benzoates.
ITEM
STANDARD
Characteristics
White crystallized powder
Content >=%
99.5
Melting point
121-124℃
Loss on drying =< %
0.5
Sulfate =< %
0.1
Burnt Residue =< PPM
300
Chlorides =< %
0.02
Heavy metals(As Pb) =< PPM
10
Arsenic =<%
0.0003
Lead =< ppm
5
Mercury =< ppm
1
Oxidisable substances
Passing test
Carbonisable substances =<
Y5
Colour of solution =<
B9