Description

8-[(4-Methylphenyl)Amino]-5-[[4-(Phenylazo)-6-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart vivid and stable coloration, making it a critical precursor in the synthesis of specialized dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of complex, high-chroma azo dyes for textiles and fibers.
• Specialty Ink Formulation: Used in the production of pigments for inks requiring specific solubility and color fastness properties, including some printing inks.
• Functional Dye Synthesis: A precursor for dyes used in non-textile applications such as paper coloring, leather dyeing, and other industrial colorants.
• Research & Development: Employed in chemical R&D for developing new chromophores and studying structure-property relationships in dye chemistry.
• Analytical Reagent: Can be utilized as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Product Name	8-[(4-Methylphenyl)Amino]-5-[[4-(Phenylazo)-6-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt
CAS No.	68683-27-2
Molecular Formula	C33H23N5O6S2•2Na
Molecular Weight	703.68 g/mol
Synonyms	Acid Red 337; C.I. 17210; 1-Naphthalenesulfonic acid, 8-[(4-methylphenyl)amino]-5-[[4-(phenylazo)-6-sulfo-1-naphthalenyl]azo]-, disodium salt; Disodium 8-[(4-methylphenyl)amino]-5-[[4-(phenylazo)-6-sulfo-1-naphthalenyl]azo]naphthalene-1-sulfonate; Azo Dye Intermediate 68683-27-2
EINECS	Contact for details

Quality Control

Our 8-[(4-Methylphenyl)Amino]-5-[[4-(Phenylazo)-6-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee it meets your technical requirements.

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 tightly sealed to prevent absorption of 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%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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