Description

4-Aminotoluene-3-Sulfonic Acid is a key aromatic sulfonic acid derivative, serving as a vital intermediate in the synthesis of complex organic molecules. Its value lies in its bifunctional nature, containing both an amino and a sulfonic acid group, which makes it a versatile building block for creating dyes, pigments, and other specialty chemicals. This compound is essential for manufacturers in the dyestuff, pharmaceutical, and agrochemical industries seeking reliable and high-purity intermediates for their production processes.

Application

4-Aminotoluene-3-Sulfonic Acid (CAS 88-44-8) is a crucial intermediate with diverse industrial applications, primarily due to its reactive amino and sulfonic acid functional groups.

• Dye and Pigment Manufacturing: Serves as a key precursor for the synthesis of azo dyes, acid dyes, and reactive dyes, providing color fastness and specific hue properties.
• Pharmaceutical Intermediates: Used in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Synthesis: Acts as a building block in the production of herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Employed in organic synthesis for creating novel compounds and in material science research.
• Surfactant and Detergent Industry: Can be utilized to produce specialized surfactants due to its sulfonic acid group.
• Photographic Chemicals: Used in the formulation of certain photographic developers and chemicals.

Basic Information

Product Name	4-Aminotoluene-3-Sulfonic Acid
CAS No.	88-44-8
Molecular Formula	C7H9NO3S
Molecular Weight	187.22 g/mol
Synonyms	3-Amino-4-methylbenzenesulfonic acid; 2-Amino-5-methylbenzenesulfonic acid; 4-Methyl-3-aminobenzenesulfonic acid; 5-Methyl-2-aminobenzenesulfonic acid; 3-Amino-p-toluenesulfonic acid; 4-Amino-3-methylbenzenesulfonic acid; 4-Methylaniline-3-sulfonic acid; 2-Amino-1-methyl-4-sulfobenzene
EINECS	201-831-8

Quality Control

Our 4-Aminotoluene-3-Sulfonic Acid is produced under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical quality parameters. Our commitment to consistent quality and traceability ensures reliability for your sensitive synthesis processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Recommended storage temperature is between 15°C and 25°C. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to light 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.