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4-Hydroxybenzenesulfonic acid Structure

4-Hydroxybenzenesulfonic acid

Chemical Properties

Melting point 52 °C
Boiling point 275.14°C (rough estimate)
Density  1.337 g/mL at 25 °C
vapor pressure  69.8Pa at 20℃
refractive index  n20/D 1.489
pka 9.11(at 25℃)
form  Liquid
color  White to Light yellow to Light red
Specific Gravity 1.337
Viscosity 166.2mm2/s
Water Solubility  Soluble in water.
Merck  14,7246
BRN  1869034
Stability Stable. Combustible. Incompatible with strong oxidizing agents.
LogP 0.41 at 25℃
CAS DataBase Reference 98-67-9(CAS DataBase Reference)
EWG's Food Scores 1
NIST Chemistry Reference Benzenesulfonic acid, 4-hydroxy-(98-67-9)
EPA Substance Registry System p-Phenolsulfonic acid (98-67-9)


Signal wordDanger
Hazard statements H290-H314
Precautionary statements P280-P305+P351+P338-P310
Hazard Codes  C
Risk Statements  34-68
Safety Statements  26-36/37/39-45
RIDADR  UN 2586 8/PG 3
WGK Germany  -
RTECS  DB6970000
HazardClass  8
PackingGroup  III
HS Code  29089990
Hazardous Substances Data 98-67-9(Hazardous Substances Data)
NFPA 704:
3 0

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