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490-79-9

Name 2,5-Dihydroxybenzoic acid
CAS 490-79-9
EINECS(EC#) 207-718-5
Molecular Formula C7H6O4
MDL Number MFCD00002460
Molecular Weight 154.12
MOL File 490-79-9.mol
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Chemical Properties

Appearance white to light beige crystalline powder
Melting point  204-208 °C(lit.)
Boiling point  237.46°C (rough estimate)
density  1.3725 (rough estimate)
refractive index  1.6400 (estimate)
storage temp.  Store below +30°C.
solubility  It is soluble in alcohol and ether.
form  Crystalline Powder
pka 2.97(at 25℃)
color  White to light beige
PH 3.21(1 mM solution);2.56(10 mM solution);2.01(100 mM solution)
Water Solubility  soluble
ε(extinction coefficient) >2000 at 337nm
Merck  14,4398
BRN  2209119
InChIKey WXTMDXOMEHJXQO-UHFFFAOYSA-N
LogP 1.740
Uses
Medicine, as sodium gentisate (analgesic).
CAS DataBase Reference 490-79-9(CAS DataBase Reference)
NIST Chemistry Reference 2,5-Dihydroxybenzoic acid(490-79-9)
EPA Substance Registry System 490-79-9(EPA Substance)
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Safety Data

Hazard Codes  Xn,Xi
Risk Statements 
R22:Harmful if swallowed.
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 .
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection .
WGK Germany  3
RTECS  LY3850000
Hazard Note  Harmful
TSCA  Yes
HS Code  29182990
Safety Profile
Poison bp intravenous route. Moderately toxic by ingestion and intraperitoneal routes. Experimental teratogenic and reproductive effects. Mutation data reported. When heated to decomposition it emits acrid smoke and irritating fumes.

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