Description

3-Aminotoluene-4-Sulphonic Acid is a versatile aromatic sulfonic acid derivative, serving as a critical intermediate in the synthesis of high-value chemical products. Its primary commercial value lies in its dual functional groups, which make it an essential building block for creating dyes, pigments, and other specialty chemicals. This compound is particularly important for manufacturers in the dye and pharmaceutical industries seeking reliable, high-purity intermediates for their production processes.

Application

• Dye and Pigment Intermediate: A key precursor in the manufacturing of azo dyes, acid dyes, and reactive dyes, contributing to color strength and fastness properties.
• Pharmaceutical Synthesis: Used as a building block in the production of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Employed in organic synthesis for the introduction of sulfonic acid and amino functional groups into more complex molecules.
• Photographic Chemicals: Can be utilized in the synthesis of certain photographic developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in specialty chemical formulations designed to prevent metal corrosion.
• Textile Auxiliary Chemicals: Used in the production of agents that improve dyeing processes and fabric treatment.

Basic Information

Product Name	3-Aminotoluene-4-Sulphonic Acid
CAS No.	88-62-0
Molecular Formula	C7H9NO3S
Molecular Weight	187.22 g/mol
Synonyms	4-Amino-3-methylbenzenesulfonic Acid; 3-Methyl-4-aminobenzenesulfonic Acid; 2-Amino-5-methylbenzenesulfonic Acid; 4-Amino-m-toluenesulfonic Acid; 3-Amino-4-methylbenzenesulfonic Acid; 5-Methyl-2-aminobenzenesulfonic Acid; 3-Amino-p-toluenesulfonic Acid; 4-Metanilic Acid
EINECS	201-849-9

Quality Control

Our 3-Aminotoluene-4-Sulphonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide full traceability and Certificates of Analysis (COA) are available for every shipment, detailing all critical quality attributes to support your regulatory and production needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 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.