3,4-Dihydroxybenzaldehyde is a valuable natural phenolic compound and versatile fine chemical intermediate. In pharmaceutical industry, it is widely applied to synthesize cardiovascular drugs, anti-inflammatory agents, antioxidants and antibacterial medicines. Its strong antioxidant activity enables it to eliminate free radicals, so it is also used in health care products to delay cell aging. In organic synthesis, it acts as a key raw material for preparing various heterocyclic compounds, flavorings and fragrances, thanks to its reactive aldehyde and phenolic hydroxyl groups which support condensation, reduction and substitution reactions. It serves as an important analytical reagent for detecting metal ions in laboratory tests. Moreover, this compound is used in cosmetic formulations as a functional additive for skin care. With stable chemical performance and multiple reactive sites, it is extensively adopted in pharmaceutical manufacturing, daily chemical industry, biochemical research and synthetic chemistry, enjoying broad application prospects in high value-added fine chemical fields.

This substance is a mild irritant classified as GHS07 warning. Inhalation of fine dust may irritate respiratory tract and cause cough or throat discomfort. Direct skin contact can lead to redness, itching and mild dermatitis, especially after long-term exposure. Eye contact will result in stinging, tearing and conjunctival irritation. Accidental ingestion may cause nausea and slight gastrointestinal upset. All operations must be carried out in well-ventilated areas or fume hoods. Wear dust mask, chemical-resistant gloves and safety goggles to avoid direct contact. Since it is prone to oxidation, keep it far away from strong oxidants, heat sources and direct sunlight. Store separately from food and daily necessities. In case of leakage, collect solid powder to prevent dust diffusion. Rinse contaminated skin thoroughly with running water for 15 minutes. Flush eyes with plenty of clean water continuously after exposure. If swallowed, drink adequate water and seek medical treatment in time. Dispose of waste materials and packaging strictly in accordance with local hazardous waste regulations.