Sodium 3-nitrobenzenesulfonate

Sodium 3-nitrobenzenesulfonate (CAS 127-68-4) is an inorganic salt commercially known under trade names including Ludigol, Nacan, Nitrol S, and Resist Salt. It carries no E-code designation and is classified under HS code 29040985 within the sulfonic acid derivatives category.

In textile and paper processing, it functions as an oxidizing reserve agent, preventing reduction of dyes during vat dyeing and discharge printing by maintaining controlled redox conditions in the bath. In biotechnology applications, it serves as a mild oxidant and catalyst in enzymatic assay systems, where its stable nitro group facilitates selective electron transfer reactions.

This material is supplied as a crystalline powder conforming to industrial-grade specifications and falls under REACH regulation (EC 1907/2006), requiring a compliant Safety Data Sheet for EU trade. Standard packaging formats include 25 kg bags. Buyers should confirm grade suitability against their process specifications prior to ordering.