This pyridine-carboxylic acid derivative is key fine pharmaceutical intermediate focused on novel small-molecule drug synthesis. Core usage is building block for JAK inhibitor, PARP inhibitor and anti-inflammatory new drug APIs via carboxylic acid esterification, amidation and cyclization reactions. In agrochemical field, it is raw material for developing pyridine-series herbicide and fungicide intermediates with high selective bioactivity. It also serves as ligand precursor for palladium, ruthenium coordination catalyst applied in cross-coupling organic synthesis reactions including Suzuki and Buchwald coupling. Analytical reagent grade is used as standard sample for HPLC qualitative analysis of pyridine carboxylic acid homologues. Regular package: 25kg inner PE bag outer cardboard drum; lab small packing 1kg/5kg aluminum foil bag, widely supplied to pharma R&D labs and custom fine chemical manufacturers globally.

GHS:H315,H319,H335；Signal Word:Warning Organic crystalline irritant solid, fine dust irritates skin, ocular mucosa and respiratory tract. Skin contact causes redness and pruritus, flush contaminated skin with abundant running water over 15 minutes. Powder splashed into eyes triggers severe irritation and lacrimation, continuously rinse eye ≥15 min with clean water and consult doctor if persistent discomfort occurs. Inhalation of airborne dust induces dry throat and cough; all feeding, crushing operations must proceed in ventilated fume hood with nitrile gloves, safety goggles and dust respirator. Prevent contact with concentrated strong base to avoid salt-forming exothermic reaction. Store separately from food additives and oxidizing agents in dry cool warehouse. Waste solid belongs to general hazardous organic waste, delivered to qualified professional institute for incineration disposal per local environmental laws, forbidden random drainage into sewer.