CAS Registry Number

CAS 2039-87-4 — 2-Chlorostyrene

2-Chlorostyrene is an organic compound featuring a chlorinated aromatic ring with a vinyl substituent, primarily used as an intermediate in pharmaceutical synthesis, agrochemicals, and specialty polymers. It appears as a colorless to pale yellow liquid with a strong odor, highly reactive in polymerization and halogenation reactions. Catalogue details: CAS 2039-87-4, molecular formula C8H7Cl, molecular weight 138.59 g/mol. Requires refrigerated storage at 2–8°C. Hazard classification includes a **Danger** signal word due to acute toxicity and flammability. Molekula supplies 2-Chlorostyrene from research to bulk quantities with full documentation and ISO 9001:2015 traceability.