A guide to Resist Salt — also known as m-nitrobenzene sulphonic acid sodium salt — and its role as a mild oxidizing agent in textile dyeing and printing and in metal finishing.
Resist Salt (sodium m-nitrobenzenesulfonate, also called m-nitrobenzene sulphonic acid sodium salt) is a mild oxidizing agent used in both textile dyeing and printing — where it prevents the reduction of dyes during fixation to protect color yield and brightness — and in metal finishing, as an anti-pitting and oxidizing additive in plating baths. Stratus Chemical supplies technical grade in bags and supersacks, with COA and SDS provided.
Resist Salt is the common trade name for the sodium salt of m-nitrobenzenesulfonic acid (sodium 3-nitrobenzenesulfonate). It is a water-soluble, mild oxidizing agent — sometimes called an anti-reduction agent — and is also sold under names such as Ludigol. Its job is to keep dyes from being chemically reduced during processing.
During the steaming and fixation stages of dyeing and printing, heat and reducing conditions can partially reduce and degrade the dye, dulling the color. Resist Salt acts as a mild oxidant that counteracts those reducing conditions, protecting the dye so that more of it fixes to the fabric. The result is better color yield, brighter shades, and more consistent, reproducible results.
Beyond textiles, the same mild oxidizing behavior is useful in electroplating. In plating baths it acts as an anti-pitting agent and oxidizing additive — for example, helping to control the oxidation state of dissolved iron and reducing pitting on the deposit — which supports a cleaner, more uniform finish.
Supplied as a technical-grade powder or granule in 25 kg bags and supersacks. COA and SDS are provided with every shipment.
Resist Salt is used as a mild oxidizing (anti-reduction) agent in textile dyeing and printing, where it prevents dyes from being reduced during steaming and fixation, protecting color yield and brightness.
Resist Salt is sodium m-nitrobenzenesulfonate (sodium 3-nitrobenzenesulfonate), the sodium salt of m-nitrobenzenesulfonic acid. It is also sold under names such as Ludigol.
By counteracting the reducing conditions that occur during steaming and fixation, Resist Salt protects the dye so more of it fixes to the fabric, giving brighter shades and more reproducible results.
Stratus supplies technical-grade Resist Salt in 25 kg bags and supersacks, with COA and SDS provided.
Yes. In addition to its role as an anti-reduction agent in textile dyeing and printing, Resist Salt (sodium m-nitrobenzenesulfonate) is used in electroplating as an anti-pitting agent and mild oxidizing additive that helps keep plating baths in a stable oxidation state for a cleaner deposit.
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