4-Nitro 4′-Amino Diphenylamine-2-Sulphonic Acid (C₁₂H₁₁N₃O₅S)
4-Nitro 4′-Amino Diphenylamine-2-Sulphonic Acid This compound is a pale to reddish-brown crystalline intermediate used primarily in the dyes and pigments industry, especially for manufacturing azo and acid dyes, as well as textile, leather, and paper coloration. It’s commonly converted into other dye intermediates like F‑C acid via catalytic reduction. In practice, it’s dissolved in alkaline solutions for use in dyeing processes Synonyms 4‑NADPSA ; 4‑Amino‑4′‑nitro‑diphenylamine‑2‑sulfonic acid ; 4‑Nitro‑4′‑Amino‑Diphenylamine‑2‑Sulphonic Acid Formula C₁₂H₁₁N₃O₅S CAS No 91‑29‑2 HS Code 29215990 Industries We Serve Dyes & Pigments Industry Textile Industry Leather Industry Ink Industry Chemical Intermediate Production Applications Vital intermediate in manufacturing various azo dyes and acid dyes. Commonly employed to produce dyes for textile, paper, and leather industries. Used extensively in producing dyes that impart vibrant and stable shades to cotton, wool, silk, and synthetic fibers. Important for producing dyes offering excellent penetration, brightness, and uniform coloration for leather goods. Utilized as an intermediate for specialty printing inks, particularly those requiring high-quality colorants. Acts as a crucial building block in the synthesis of various complex chemical compounds, including dye intermediates and colorants.
