Description

4-Nitro-2-Sulfoaniline is a key aromatic intermediate featuring both nitro and sulfonic acid functional groups, making it a versatile building block for complex chemical synthesis. Its primary commercial value lies in its role as a precursor for the production of azo dyes, pigments, and other specialty colorants. This compound is essential for manufacturers in the dyestuff, textile, and fine chemical industries seeking to develop vibrant and stable colors.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a critical diazo component in the synthesis of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Specialty Colorant Production: Used in manufacturing high-performance pigments for inks, plastics, and coatings that require specific lightfastness and chemical resistance.
• Chemical Synthesis Building Block: The reactive amino, nitro, and sulfo groups allow for further functionalization in organic synthesis for pharmaceuticals and agrochemical intermediates.
• Research & Development: Employed in academic and industrial R&D labs for developing novel chromophores and functional materials.

Basic Information

Item	Details
Product Name	4-Nitro-2-Sulfoaniline
CAS No.	96-75-3
Molecular Formula	C6H6N2O5S
Molecular Weight	218.19 g/mol
Synonyms	2-Amino-5-nitrobenzenesulfonic acid; 5-Nitro-2-aminobenzenesulfonic acid; 4-Nitroaniline-2-sulfonic acid; 1-Amino-2-sulfo-4-nitrobenzene; 4-Nitro-2-aminobenzenesulfonic acid; 2-Sulfo-4-nitroaniline; 5-Nitroanthranilic acid sulfonic acid; Aniline, 4-nitro-2-sulfo-
EINECS	202-534-4

Quality Control

Our production of 4-Nitro-2-Sulfoaniline adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications, including identity confirmation, assay, and impurity profile. Certificates of Analysis (COA) documenting all test results are provided and available upon request to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Yellow to brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.