Description

7-Anilino-3-[[4-[(2,4-Dimethyl-6-Sulphophenyl)Azo]-6-Methoxy-m-Tolyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid is a high-purity, synthetic organic compound belonging to the class of azo dyes and pigments. This chemical is valued for its strong chromophoric properties and is engineered for demanding applications where color fastness and chemical stability are critical. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent colorants.

Application

• Textile Dyeing: As a key intermediate for producing high-performance dyes for synthetic and natural fibers.
• Ink Formulation: Used in the manufacture of industrial and specialty printing inks requiring specific hue and durability.
• Pigment Production: Serves as a precursor in the synthesis of organic pigments for plastics and coatings.
• Leather Coloring: Employed in dye formulations for the leather tanning and finishing industry.
• Paper Coloring: Applied in the production of colored papers and paper products.
• Research & Development: Used as a standard or intermediate in chemical research and analytical method development.

Basic Information

Product Name	7-Anilino-3-[[4-[(2,4-Dimethyl-6-Sulphophenyl)Azo]-6-Methoxy-m-Tolyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid
CAS No.	25188-53-8
Molecular Formula	C32H27N5O7S2
Molecular Weight	657.72 g/mol
Synonyms	Acid Red 337; C.I. 17210; 7-Anilino-4-hydroxy-3-[[4-[(2,4-dimethyl-6-sulfophenyl)azo]-6-methoxy-m-tolyl]azo]naphthalene-2-sulfonic acid; 4-Hydroxy-7-(phenylamino)-3-[[4-[(2,4-dimethyl-6-sulfophenyl)azo]-6-methoxy-m-tolyl]azo]-2-naphthalenesulfonic acid; Azo dye intermediate 25188-53-8; 2-Naphthalenesulfonic acid, 7-(phenylamino)-3-[[4-[(2,4-dimethyl-6-sulfophenyl)azo]-6-methoxy-m-tolyl]azo]-4-hydroxy-
EINECS	Contact for details

Quality Control

Our 7-Anilino-3-[[4-[(2,4-Dimethyl-6-Sulphophenyl)Azo]-6-Methoxy-m-Tolyl]Azo]-4-Hydroxynaphthalene-2-Sulphonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and physical characteristics are provided and available upon request to support your quality assurance protocols.

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 nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%

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