3-nitrobenzenesulfonic acid

3-Nitrobenzenesulfonic acid (CAS 98-47-5), also known as m-nitrobenzenesulfonic acid, is an aromatic sulfonic acid used primarily as a chemical intermediate and acid catalyst in organic synthesis.

Where is 3-nitrobenzenesulfonic acid used?

• Pharmaceutical manufacturing: key intermediate in the synthesis of active pharmaceutical ingredients and fine chemicals
• Dye and pigment production: coupling component or intermediate in the preparation of azo dyes for textile and leather substrates
• Textile processing: dyeing auxiliary and pH modifier that improves dye uptake and fixation on fiber
• Printing ink formulators use it as a precursor for specialty colorants.

Commercial specifications

• Anhydrous form and sodium salt derivatives