Description

5-Nitro-2-p-Toluidinobenzenesulphonic Acid is a key organic intermediate characterized by its sulfonic acid and nitro-substituted aromatic structure. This compound matters for its role as a versatile building block in the synthesis of more complex chemical entities, particularly dyes and pigments. Industries involved in the manufacturing of colorants, specialty chemicals, and research institutions require this high-purity intermediate for their development and production processes.

Application

This chemical intermediate serves critical functions across several industrial sectors due to its reactive functional groups.

• Dye and Pigment Manufacturing: Primarily used as a key precursor in the synthesis of azo dyes and other complex colorants.
• Specialty Chemical Synthesis: Acts as a building block for creating more advanced organic compounds in pharmaceutical and agrochemical research.
• Research & Development: Employed in academic and industrial labs for studying sulfonation and nitration reactions, and for developing new synthetic pathways.
• Chemical Intermediate Production: Serves in the supply chain for producing other fine chemicals and functional materials.

Basic Information

Product Name	5-Nitro-2-p-Toluidinobenzenesulphonic Acid
CAS No.	91-28-1
Molecular Formula	C13H12N2O5S
Molecular Weight	308.31 g/mol
Synonyms	5-Nitro-2-(p-toluidino)benzenesulfonic Acid; 2-(4-Methylanilino)-5-nitrobenzenesulfonic Acid; 4-Methyl-2'-nitrodiphenylamine-2-sulfonic Acid; C.I. 37120; p-Toluidine-m-nitrobenzenesulfonic Acid; 5-Nitro-2-(4-methylanilino)benzenesulfonic Acid; 2-Anilino-5-nitrobenzenesulfonic Acid, 4'-methyl-; Benzenesulfonic acid, 5-nitro-2-[(4-methylphenyl)amino]-
EINECS	202-058-3

Quality Control

Our 5-Nitro-2-p-Toluidinobenzenesulphonic Acid is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters are available upon request, providing full traceability and compliance assurance for your quality protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to brownish powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (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.