Description

3,3'-Dimethyl-4,4'-Diaminodiphenyl-5-Sulfonic Acid is a specialized aromatic sulfonic acid derivative featuring two amine functional groups. This compound serves as a critical high-purity intermediate in the synthesis of advanced colorants and functional polymers. It is primarily required by manufacturers in the dyes and pigments, specialty polymers, and pharmaceutical intermediates sectors, where its unique structure enables the creation of products with specific chromatic and chemical properties.

Application

• Key Intermediate for Azo Dyes and Pigments: Serves as a crucial diazo component for producing high-performance, light-fast yellow, orange, and red dyes for textiles, inks, and plastics.
• Synthesis of Optical Brighteners: Used in the manufacturing of fluorescent whitening agents (FWAs) for paper, detergents, and textiles.
• Production of Specialty Polymers: Acts as a monomer or cross-linking agent in the synthesis of polyamides, polyimides, and other high-temperature or conductive polymers.
• Pharmaceutical Intermediate: Employed in the research and development of active pharmaceutical ingredients (APIs), particularly those with sulfonamide or complex aromatic structures.
• Liquid Crystal and Electronic Materials: Utilized in the synthesis of compounds for liquid crystal displays (LCDs) and other electronic applications due to its rigid, planar structure.
• Corrosion Inhibitors and Additives: Functions as a building block for creating specialty chemicals used in metal treatment and functional fluid formulations.

Basic Information

Product Name	3,3'-Dimethyl-4,4'-Diaminodiphenyl-5-Sulfonic Acid
CAS No.	55698-30-1
Molecular Formula	C14H16N2O3S
Molecular Weight	292.35 g/mol
Synonyms	4,4'-Diamino-3,3'-dimethyldiphenyl-5-sulfonic Acid; 3,3'-Dimethylbenzidine-5-sulfonic Acid; DMDPS Acid; 5-Sulfo-3,3',4,4'-tetraaminodiphenylmethane (related); Bis(3-methyl-4-aminophenyl)-5-sulfonic Acid; 3,3'-Dimethyl-4,4'-diaminobiphenyl-5-sulfonic Acid; 4,4'-Diamino-3,3'-dimethyl-1,1'-biphenyl-5-sulfonic Acid
EINECS	Contact for details

Quality Control

Our production of 3,3'-Dimethyl-4,4'-Diaminodiphenyl-5-Sulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is characterized using advanced analytical techniques including HPLC, NMR, and FTIR. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is easily oxidized; for long-term storage, consider an inert atmosphere (e.g., nitrogen or argon) to maintain stability. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Light yellow to beige 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
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%
Solubility (1% in 1N NaOH)	Clear, yellow solution

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