5-chlorosalicylic acid

5-Chlorosalicylic acid (CAS 321-14-2), also referenced in procurement as 5-CSA, is an organochlorine derivative of salicylic acid used as a building block in pharmaceutical synthesis and as a functional additive in industrial formulations.

Where is 5-chlorosalicylic acid used?

• Pharmaceutical manufacturing: key intermediate
• Synthesis of antimicrobial and anti-inflammatory APIs, where controlled chlorination and hydroxyl positioning are critical to the final molecule's activity
• Coating and resin formulators incorporate it as a UV stabilizer and antioxidant to extend the service life of protective coatings exposed to outdoor weathering
• Adhesive and sealant systems: biocidal and preservation properties that inhibit microbial degradation
• Personal care: preservative-boosting component in leave-on and rinse-off products where broad-spectrum efficacy is required

Commercial specifications

• Technical and pharmaceutical-grade material; pharmaceutical-grade product typically meeting defined purity thresholds
• Packaging ranges from kilogram-scale laboratory quantities to bulk drum supply