Description

4-Methylmetanilic Acid is a key sulfonic acid derivative and an important intermediate in the synthesis of azo dyes and pigments. Its value lies in providing the necessary sulfonic acid group and aromatic structure to impart water-solubility, brightness, and colorfastness to final dye products. This compound is primarily needed by manufacturers in the dye and pigment industry, as well as by research institutions developing new colorants and specialty chemicals.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial coupling component in the production of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the synthesis of organic pigments that require sulfonic acid functionality for improved dispersion and application properties.
• Chemical Synthesis: Acts as a building block for more complex sulfonated aromatic compounds in specialty chemical research and development.
• Research & Development: Utilized in laboratories for studying dye chemistry, photochemical properties, and developing new colorant formulations.

Basic Information

Product Name	4-Methylmetanilic Acid
CAS No.	618-03-1
Molecular Formula	C7H9NO3S
Molecular Weight	187.21 g/mol
Synonyms	2-Amino-5-methylbenzenesulfonic acid; 6-Amino-m-toluenesulfonic acid; 2-Amino-5-methylbenzene-1-sulfonic acid; 5-Methyl-2-aminobenzenesulfonic acid; 4-Methyl-2-aminobenzenesulfonic acid; 4-Methylaniline-2-sulfonic acid; Metanilic acid, 4-methyl-
EINECS	210-540-4

Quality Control

Our production of 4-Methylmetanilic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. The product undergoes comprehensive analytical testing, including assay, impurity profiling, and identification. A Certificate of Analysis (COA) detailing purity, physical characteristics, and test results is provided with each shipment to guarantee it meets your technical specifications.

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 sealed to prevent absorption of atmospheric moisture, which can affect product quality.

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%

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