Description

4-Amino-2-Nitro-3-Toluenesulfonic Acid is a specialized aromatic sulfonic acid derivative that serves as a critical building block in advanced organic synthesis. Its unique structure, featuring both amino and nitro functional groups on a toluenesulfonic acid backbone, makes it a valuable intermediate for creating complex molecules with specific properties. This compound is primarily sought after by manufacturers in the dye, pigment, and pharmaceutical intermediate sectors. Its consistent quality and reliable supply are essential for ensuring the performance and reproducibility of final high-value products.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and other complex colorants, contributing to color fastness and hue.
• Pharmaceutical Synthesis: Used as a versatile building block for constructing active pharmaceutical ingredients (APIs) and other bioactive molecules.
• Chemical Research & Development: Employed in academic and industrial R&D for exploring new synthetic pathways and creating novel chemical entities.
• Specialty Chemical Manufacturing: Serves as an intermediate in the production of corrosion inhibitors, surfactants, and other functional chemicals.
• Photographic Chemicals: Can be utilized in the synthesis of certain compounds used in photographic and imaging technologies.

Basic Information

Product Name	4-Amino-2-Nitro-3-Toluenesulfonic Acid
CAS No.	226711-11-1
Molecular Formula	C7H8N2O5S
Molecular Weight	232.21 g/mol
Synonyms	3-Toluenesulfonic acid, 4-amino-2-nitro-; 4-Amino-2-nitro-m-toluenesulfonic acid; 2-Nitro-4-amino-3-methylbenzenesulfonic acid; 3-Methyl-4-amino-6-nitrobenzenesulfonic acid; Benzenesulfonic acid, 4-amino-3-methyl-6-nitro-; 4-Amino-2-nitro-3-methylbenzenesulfonic acid; 6-Nitro-3-methyl-4-aminobenzenesulfonic acid
EINECS	Contact for details

Quality Control

Our 4-Amino-2-Nitro-3-Toluenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. We provide a Certificate of Analysis (COA) with every shipment, detailing key parameters such as assay, moisture content, and heavy metals. Our quality commitment ensures batch-to-batch consistency and reliability for your critical synthesis processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is between 15°C and 25°C. Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 1.5%

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