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Name 4-Hydroxybenzoic acid
CAS 99-96-7
EINECS(EC#) 202-804-9
Molecular Formula C7H6O3
MDL Number MFCD00002547
Molecular Weight 138.12
MOL File 99-96-7.mol

Chemical Properties

Appearance White to ivory crystalline powder
Melting point  213-217 °C (lit.)
Boiling point  213.5°C (rough estimate)
density  1,46 g/cm3
vapor pressure  0Pa at 20℃
FEMA  3986
refractive index  1.4600 (estimate)
Fp  199 °C
storage temp.  Store below +30°C.
solubility  methanol: soluble5%, clear to slightly hazy, colorless to faintly yellow
form  Crystalline Powder
pka 4.48(at 19℃)
color  White to ivory
Odor at 100.00 %. phenolic nutty
PH 3.3 (1g/l, H2O, 20℃)
Odor Type phenolic
Water Solubility  5 g/L (20 ºC)
Usage Acetylsalicylic Acid Impurity A
JECFA Number 957
Merck  14,4812
BRN  970950
LogP 0.878 at 22℃
CAS DataBase Reference 99-96-7(CAS DataBase Reference)
NIST Chemistry Reference Benzoic acid, 4-hydroxy-(99-96-7)
EPA Substance Registry System 99-96-7(EPA Substance)

Safety Data

Hazard Codes  Xi
Risk Statements 
R36:Irritating to the eyes.
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S37/39:Wear suitable gloves and eye/face protection .
S36:Wear suitable protective clothing .
WGK Germany  1
RTECS  DH1925000
Autoignition Temperature >250 °C
HS Code  29182930
Hazardous Substances Data 99-96-7(Hazardous Substances Data)
LD50 orally in Rabbit: > 5000 mg/kg

Hazard Information

Material Safety Data Sheet(MSDS)

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