CAS No：504-17-6 Chemical Name：3,4-Dihydroxybenzaldehyde Alias：Protocatechuic aldehyde Molecular Formula：C?H?O?

Molecular Weight：138.12

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 IR Identification：Consistent with reference standard

Pharmaceutical intermediate for cardiovascular, antioxidant, anti-inflammatory drugs.

Natural standard for quality control of herbal medicines and supplements. Organic building block for condensation, reduction, cyclization and coupling. Cosmetic ingredient with antioxidant and free radical scavenging effects. Analytical reagent for color reaction and metal ion detection. Biochemical reagent for enzyme inhibition and cell research.

Storage：Sealed, cool, dry, strictly protected from light

General storage：Room temperature with nitrogen blanketing Long-term storage：2～8 ℃, dark, dry conditions Hazard：Low toxicity, slight irritation, easy oxidation Protection：Wear dust mask, goggles and chemical gloves Precautions：Avoid dust inhalation and skin/eye contact

Incompatible：Strong oxidants, acids, bases, air exposure