Description

p-[(4,6-Diamino-m-Tolyl)Azo]Benzenesulphonic Acid is a specialized azo dye intermediate with the CAS registry number 17895-40-8. This compound is valued for its role as a key precursor in the synthesis of high-performance dyes and pigments, offering critical chromophoric and auxochromic properties. It is primarily required by manufacturers in the textile, leather, and specialty chemical industries for producing colorants with specific fastness and hue characteristics.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block in the synthesis of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics, where color stability is paramount.
• Leather Dyeing: Employed in the formulation of dyes for leather finishing, providing deep, uniform coloration.
• Research & Development: Utilized in chemical R&D labs for developing novel chromophores and studying azo coupling reactions.
• Specialty Chemical Synthesis: Acts as an intermediate for more complex functional dyes used in biological staining or analytical indicators.

Basic Information

Product Name	p-[(4,6-Diamino-m-Tolyl)Azo]Benzenesulphonic Acid
CAS No.	17895-40-8
Molecular Formula	C13H14N4O3S
Molecular Weight	306.34 g/mol
Synonyms	4-[(4,6-Diamino-3-methylphenyl)azo]benzenesulfonic acid; Benzenesulfonic acid, 4-[(4,6-diamino-3-methylphenyl)azo]-; p-[(4,6-Diamino-m-tolyl)azo]benzenesulfonic acid; C.I. 37235; Acid Yellow 99 intermediate; 4,6-Diamino-m-tolylazobenzenesulfonic acid; 3-Methyl-4,6-diaminoazobenzenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of p-[(4,6-Diamino-m-Tolyl)Azo]Benzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. A Certificate of Analysis (COA) detailing all critical parameters is provided with each shipment to guarantee traceability and compliance.

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 stability and performance.

Specification

Item	Specification
Appearance	Brown to dark brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%
Solubility	Soluble in alkaline water

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