n-Nitrosodiphenylamine

N-Nitrosodiphenylamine (CAS 86-30-6) is an organic nitrogen compound commercially known under trade names including Redax, Retarder J, and Vulkalent A. It belongs to the amine chemical class and carries EC number 201-663-0 with the molecular formula C12H10N2O. No E-code designation applies to this substance.

In rubber processing, N-Nitrosodiphenylamine functions as a prevulcanisation inhibitor, slowing premature crosslinking during compounding and calendering to extend scorch time without compromising final cure properties. It is also employed as an antioxidant and stabiliser in polymer systems, where it interrupts oxidative chain reactions to retard degradation during processing and storage.

This substance is supplied as a crystalline solid and is subject to REACH regulation within the European Union, where it is listed as a substance of very high concern due to its carcinogenic classification. Procurement teams should verify current authorisation status and applicable restrictions before sourcing. Standard industrial packaging formats apply depending on supplier specification.