Chemical Name：3,4-Dihydroxybenzoic acid
Alias：Protocatechuic acid
Molecular Weight：154.12
HPLC Purity：≥99.0%
Loss on Drying：≤0.3%
Residue on Ignition：≤0.1%
Water Content：≤0.2%
Single Impurity：≤0.5%
Total Impurities：≤1.0%
Heavy Metals：≤10 ppm
Melting range：Compliant
IR Identification：Consistent with reference standard
Pharmaceutical intermediate for antibacterial, anti-inflammatory, antioxidant and cardiovascular drugs.
Natural extract standard for TCM and health product analysis.
Cosmetic ingredient with antioxidant, whitening and anti-irritation effects.
Organic building block for esterification, amidation, coupling and heterocycle synthesis.
Analytical reagent for metal ion indicator and chromatography standard.
Pesticide intermediate for fungicides and plant growth regulators. 
Storage：Sealed, cool, dry, dark and ventilated place
General storage：Stable at room temperature
Long-term storage：Store at 2～8 ℃
Hazard：Low toxicity, slight irritation
Protection：Wear dust mask, goggles and chemical gloves
Precautions：Avoid dust inhalation and skin/eye contact
Incompatible：Keep away from strong oxidants, strong bases and metal salts 
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