4-Pyridinecarboxaldehyde is an important pyridine aldehyde intermediate with high chemical activity. The active aldehyde group can undergo condensation, reduction, amination and cyclization reactions to construct various nitrogen heterocyclic derivatives. It is mainly used for synthesizing anti-tumor, antibacterial, cardiovascular and central nervous system pharmaceutical intermediates, and widely applied in the research and production of new veterinary drugs. In pesticide industry, it is used to prepare high-efficiency fungicides, insecticides and plant growth regulators. It also serves as key raw material for organic dyes, metal chelating agents and chemical analytical reagents. Besides, it is commonly used in Schiff base synthesis, catalyst preparation and laboratory organic synthesis research, occupying a core position in fine chemical and pharmaceutical synthetic chains.

This chemical has moderate irritation and low toxicity. Inhalation of its volatile vapor will irritate respiratory tract, cause sore throat, cough and dizziness, and long-term inhalation may affect respiratory health. Skin contact easily causes skin degreasing, redness, itching and mild inflammatory reaction. Direct eye contact leads to severe stinging, tearing and conjunctival inflammation, which needs continuous flushing with plenty of clean water for over 15 minutes. Accidental ingestion will induce nausea, vomiting and abdominal discomfort. All operations must be carried out in well-ventilated fume hood, operators shall wear chemical resistant gloves, safety goggles and protective masks. Store separately from food, daily goods and acidic substances. Waste liquid and empty containers shall be disposed strictly according to chemical waste standards to prevent environmental pollution and potential safety risks.