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