Specifications

4-Hydroxy Benzoic Acid
1,high purity and fair price
2,fast delivery
3,SGS,BV,CIQ inspection welcoming

4-Hydroxy Benzoic Acid

1. Physical Appearance : White silky flakes or needle-shaped crystals,benzin or benzoic aldehyde savor,soluble in ethanol and slightly soluble in water
2. Molecular formula:C₇H₆O₂
Molecular weight:122.12
CAS :65-85-0
EINECS No.:200-618-2
3. Specification:

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