2-Chloro-4-nitroaniline

2-Chloro-4-nitroaniline (CAS 121-87-9) is an aromatic amine compound also referenced under the names 4-Nitro-2-chloroaniline, o-Chloro-p-nitroaniline, and the abbreviation OCPNA. It is registered under NSC 3548 and belongs to the halogenated nitroaniline family of intermediates.

In pharmaceutical synthesis, OCPNA serves as a key building block for active ingredient production, where its reactive amine and nitro groups enable selective coupling reactions. In textile and leather processing, it functions as a dye intermediate, participating in azo dye formation through diazotization. It also supports polymerization initiation processes in specialty printing and packaging applications.

2-Chloro-4-nitroaniline is supplied as a technical-grade material and is subject to REACH registration requirements for commercial quantities within the European Economic Area. Procurement teams should confirm supplier compliance documentation, including Safety Data Sheets aligned with EU GHS standards, prior to ordering.