5-Chlorosalicylic acid

5-Chlorosalicylic acid (CAS 321-14-2) is a chlorinated derivative of salicylic acid, also referenced as 5-chloro-salicylic acid or chlorosalicylic(5-) acid. It carries no assigned E-code and is classified under organic acids. It is commercially available from European chemical distributors under its INCI and systematic trade designations.

In pharmaceutical and personal care formulations, it functions as an antimicrobial preservative by disrupting microbial cell membranes, and as a UV absorber by capturing ultraviolet radiation before it degrades sensitive active ingredients. In coatings and adhesive systems, it acts as an antioxidant stabilizer, inhibiting oxidative chain reactions that cause premature material degradation.

Supplied as an off-white to cream powder or crystal, it is available in technical and pharmaceutical-grade specifications. Procurement should verify REACH compliance documentation and supplier safety data sheets for EU market entry. Standard packaging formats include multi-kilogram bags and drums; HS code 29182990 applies for import classification.