2 Chloro 1-4-Phenylendiamine

2-Chloro-1,4-Phenylenediamine (CAS No. 615-66-7) is an aromatic diamine compound with the molecular formula C₆H₇ClN₂ and a molecular weight of 142.59 g/mol. It appears as a white to gray crystalline powder and is slightly soluble in water, with better solubility in organic solvents like ethanol and DMSO. This compound is primarily used as an intermediate in the synthesis of dyes, pigments, and hair colorants. Its structure features a chloro-substituted benzene ring with two amino groups, enabling high reactivity in diazotization and coupling reactions. It is also used in the preparation of specialty chemicals and pharmaceutical intermediates. With a melting point of 63–67 °C and λmax at 318 nm in ethanol, it offers stability and consistent performance in formulation processes. Manufactured under controlled conditions, it complies with ISO and REACH standards. Due to its irritant properties, it must be handled with appropriate safety measures and protective equipment.