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Benzoic acid index 

Items 

Index 

Content

99-100.5%

Loss on drying

≤0.5% after drying for three hours over sulphuric acid

Melting range

121.5-123.5°C

PH

About 4 (solution in water)

Arsenic

≤3 ppm

Lead

≤5 ppm

Mercury

≤1 ppm

Heavy metal (as pb)

≤10 ppm

Sulphated ash

≤0.05%

Positive sublimation test and test for benzoate

Qualified with regulations

Readily oxidizable substances

Qualified with regulations

Polycyclic acid

Pass test

Chlorinated organic compounds

≤300 ppm

Appearance of solution

Clarification, colorless

Shelf life

2 years