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3,4-Dihydroxybenzoic acid

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3,4-Dihydroxybenzoic acid

EINECS 202-760-0
CAS No. 99-50-3 Density 1.559 g/cm3
Solubility Melting Point 197-200 °C (dec.)(lit.)
Formula C7H6O4 Boiling Point 410.7 °C at 760 mmHg
Molecular Weight 154.12 . Flash Point 216.3 °C
Transport Information Appearance white to light yellow crystal powder
Safety 26-36-37/39 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 99-50-3 (3,4-Dihydroxybenzoic acid) Hazard Symbols IrritantXi

4-Carboxy-1,2-dihydroxybenzene;Protocatehuic acid;1/C7H6O4/c8-5-2-1-4(7(10)11)3-6(5)9/h1-3,8-9H,(H,10,11;4-10-00-01459 (Beilstein Handbook Reference);Benzoic acid, 3,4-dihydroxy- (9CI);Benzoic acid,3,4-dihydroxy-;3.4-Dihydroxy Benzoic Acid;Protocatechuate;3,4-Dihydroxy Benzoic Acid;Benzoic acid, 3,4-dihydroxy-;3,4-dihydroxybenzoic acid;protocatechuic acid;3,4-Dihydroxybenzoic Acid 98%;


3,4-Dihydroxybenzoic acid Chemical Properties

Molecular Formula: C7H6O4
Molecular Weight: 154.12 g/mol 
EINECS: 202-760-0 
Index of Refraction: 1.67
Density: 1.559 g/cm3
Flash Point: 216.3 °C
Enthalpy of Vaporization: 69.92 kJ/mol
Boiling Point: 410.7 °C at 760 mmHg
Vapour Pressure: 1.75E-07 mmHg at 25 °C
Melting point: 197-200 °C (dec.)(lit.)
Sensitive: Air Sensitive
Appearance: White to light yellow crystal powder
Structure of 3,4-Dihydroxybenzoic acid (CAS NO.99-50-3):
IUPAC Name: 3,4-Dihydroxybenzoic acid
Product Category of 3,4-Dihydroxybenzoic acid (CAS NO.99-50-3): Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts;Benzoic Acid Derivative;Organic acids;API

3,4-Dihydroxybenzoic acid Toxicity Data With Reference


dni-hmn:lyms 1 mmol/L

    BCPCA6    Biochemical Pharmacology. 29 (1980),1275.

msc-mus:lyms 300 mg/L

    EMMUEG    Environmental and Molecular Mutagenesis. 11 (1988),523.

cyt-ham:ovr 3 g/L

    CALEDQ    Cancer Letters (Shannon, Ireland). 14 (1981),251.

ipr-mus LD50:>800 mg/kg

    JPETAB    Journal of Pharmacology and Experimental Therapeutics. 196 (1976),478.

3,4-Dihydroxybenzoic acid Safety Profile

Moderately toxic by intraperitoneal route. Human mutation data reported. When heated to decomposition it emits acrid smoke and irritating vapors.
Hazard Codes: IrritantXi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-37/39
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.

3,4-Dihydroxybenzoic acid Specification

 3,4-Dihydroxybenzoic acid , its cas register number is 99-50-3. It also can be called Protocatechuic acid . 3,4-Dihydroxybenzoic acid (CAS NO.99-50-3) has mixed effects on normal and cancer cells in in vitro and in vivo studies. It has been reported to induce apoptosis of human leukemia cells, as well as malignant HSG1 cells taken from human oral cavities,but it was found to have mixed effects on TPA-induced mouse skin tumours.

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