Description

m-Toluidine-4-Sulfonic Acid CAS NO 133-78-8 is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of dyes, pigments, and specialty chemicals. Its value lies in providing a reactive sulfonic acid group and an aromatic amine functionality, enabling the creation of complex molecular structures with specific color and solubility properties. This compound is essential for manufacturers in the dye and pigment industry, as well as for research and development of advanced organic materials.

Application

• Dye and Pigment Intermediate: A crucial building block for synthesizing azo dyes, acid dyes, and reactive dyes, imparting color fastness and solubility.
• Pharmaceutical Synthesis: Used as an intermediate in the production of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Serves as a starting material or reagent in organic synthesis for creating novel compounds and functional materials.
• Photographic Chemicals: Can be utilized in the manufacture of certain photographic developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in specialty chemical formulations designed to protect metal surfaces.
• Liquid Crystal & Electronic Material Precursor: Employed in the synthesis of advanced organic materials for electronic applications.

Basic Information

Product Name	m-Toluidine-4-Sulfonic Acid
CAS No.	133-78-8
Molecular Formula	C7H9NO3S
Molecular Weight	187.22 g/mol
Synonyms	4-Amino-3-methylbenzenesulfonic Acid; 3-Methyl-4-aminobenzenesulfonic Acid; 3-Toluidine-4-sulfonic Acid; 4-Amino-m-toluenesulfonic Acid; 2-Amino-6-methylbenzenesulfonic Acid; m-Toluidine-p-sulfonic Acid; 4-Sulfo-m-toluidine
EINECS	205-129-4

Quality Control

Our m-Toluidine-4-Sulfonic Acid is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment ensures the material meets the stringent requirements for use in fine chemical synthesis and industrial applications.

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). Keep away from strong oxidizing agents and strong bases. The compound may be hygroscopic; protect from excessive moisture to prevent caking or degradation.

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.