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2-Amino-5-methylbenzenesulfonic acid (CAS No: 88-44-8), commonly known as 4B Acid, serves as a cornerstone intermediate in the global organic pigment industry, specifically for the synthesis of high-performance azo pigments like C.I. Pigment Red 57:1 (Lithol Rubine BK) used extensively in solvent-based packaging inks and plastics. The market is currently experiencing a shift towards high-purity grades, typically exceeding 99%, as downstream manufacturers seek to improve the chromaticity and dispersion stability of pigments in automotive coatings and digital printing applications. Furthermore, while the dye sector remains its primary driver, 4B acid is increasingly utilised as a specialised building block in the synthesis of pharmaceutical intermediates and agrochemical precursors, benefiting from its unique sulfonated aromatic structure which enhances the solubility and bioavailability of complex bioactive molecules. As globally established 2-Amino-5-methylbenzenesulfonic acid supplier with 99% purity, we ensure dependable supply, consistent quality, and complete regulatory documentation, including 2-Amino-5-methylbenzenesulfonic acid CoA and 2-Amino-5-methylbenzenesulfonic acid TDS across all grades. Beyond supply, we support partners through the entire product lifecycle from route scouting, process and formulation development, and analytical method development to scale-up, process optimisation, and pilot-to-commercial manufacturing. Our teams also assist with GMP-compliant quality assurance, regulatory documentation, and global supply chain and logistics coordination.
2-Amino-5-methylbenzenesulfonic acid (CAS No: 88-44-8), commonly known as 4B Acid, serves as a cornerstone intermediate in the global organic pigment industry, specifically for the synthesis of high-performance azo pigments like C.I. Pigment Red 57:1 (Lithol Rubine BK) used extensively in solvent-based packaging inks and plastics. The market is currently experiencing a shift towards high-purity grades, typically exceeding 99%, as downstream manufacturers seek to improve the chromaticity and dispersion stability of pigments in automotive coatings and digital printing applications. Furthermore, while the dye sector remains its primary driver, 4B acid is increasingly utilised as a specialised b...
Chemical Properties & Specifications
P260, P264, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P321, P363, P405, and P501
Skin Corr. 1B (26.2%)
A versatile aromatic organic intermediate mainly used in the preparation of acid dyes, reactive dyes, and organic pigments such as Pigment Red 6B, Litholbromine Red BK, and Pigment Brilliant Yellow Red BL
A critical building block used for the production of pigment C.I. 57:1 (Pigment Brilliant Red 6B) and other specialized pigments used in coloring inks, plastics, rubber, and daily chemical products
A functionalized benzene derivative utilized in the synthesis of pharmaceuticals, pesticides, and other fine chemical products
A high-purity chemical used in academic and industrial research for chemical analysis and the development of complex organic molecules.
2-Amino-5-methylbenzenesulfonic acid, also known as 4B Acid or 4-Aminotoluene-3-sulfonic acid, is an aromatic organic intermediate used primarily in the preparation of acid dyes, reactive dyes, and organic pigments like Pigment Red 6B and Litholbromine Red BK
This compound is widely used in the dyestuff, pigment, pharmaceutical, and agrochemical industries for coloring inks, plastics, rubber, and synthesizing fine chemicals
It is slightly soluble in cold water, more soluble in boiling water, and highly soluble in alkaline solutions where it forms water-soluble salts
Standard specifications include CAS number 88-44-8, high purity (typically ≥98% or 99%), and documentation such as COA, TDS, impurity reports, and regulatory compliance documents
Scimplify has capabilities for global distribution and custom synthesis through an integrated network of manufacturers and logistics partners with reliable lead time
The product is export ready with a standard MOQ starting from 100 kgs, with lead times for international customers depending on the shipping destination and specific grade.
Category : Dye and Pigment Intermediates
Sub-Category : Nitrophenols
Category : Base Chemicals & Intermediates, Dye and Pigment Intermediates
Sub-Category : Aromatic Hydrocarbons, Synthetic Intermediates
Description : Ortho-xylene (CAS No. 95-47-6) serves as a fundamental aromatic building block, with approximately 9...
