Description

3-[(2,4-Dimethylphenyl)Azo]-4-Hydroxy-7-[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulfo-2-Naphthalenyl]Amino]-2-Naphthalenesulfonic Acid Disodium Salt is a high-purity, complex disazo dye intermediate essential for producing vivid and stable colorants. This compound matters because it offers precise chromophore structure for synthesizing specialized dyes with excellent lightfastness and wash resistance. It is primarily needed by manufacturers in the textile, ink, and specialty pigment industries seeking to develop high-performance color products.

Application

• Textile Dye Synthesis: A key intermediate for manufacturing high-grade, wash-fast azo dyes for synthetic and natural fibers.
• Inkjet and Printing Ink Formulation: Used to produce colorants for high-resolution inks requiring excellent color strength and stability.
• Specialty Pigment Production: Serves as a precursor for creating complex organic pigments used in plastics, coatings, and automotive finishes.
• Leather Dyeing: Employed in the synthesis of dyes for leather goods, providing deep, uniform coloration.
• Paper Coloring: Used in the development of dyes for high-quality paper and packaging materials.
• Research & Development: A valuable chemical for R&D labs exploring new chromophores and dye structures in material science.

Basic Information

Product Name	3-[(2,4-Dimethylphenyl)Azo]-4-Hydroxy-7-[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulfo-2-Naphthalenyl]Amino]-2-Naphthalenesulfonic Acid Disodium Salt
CAS No.	68959-37-5
Molecular Formula	C41H30N6Na2O10S2
Molecular Weight	876.80 g/mol
Synonyms	Acid Red 337; C.I. 17215; Disodium 3-[(2,4-dimethylphenyl)azo]-4-hydroxy-7-[[5-hydroxy-6-[(2-methoxyphenyl)azo]-7-sulphonato-2-naphthyl]amino]-2-naphthalenesulphonate; 2-Naphthalenesulfonic acid, 3-[(2,4-dimethylphenyl)azo]-4-hydroxy-7-[[5-hydroxy-6-[(2-methoxyphenyl)azo]-7-sulfo-2-naphthalenyl]amino]-, disodium salt; C.I. Acid Red 337; Azo dye intermediate 68959-37-5
EINECS	Contact for details

Quality Control

Our production of 3-[(2,4-Dimethylphenyl)Azo]-4-Hydroxy-7-[[5-Hydroxy-6-[(2-Methoxyphenyl)Azo]-7-Sulfo-2-Naphthalenyl]Amino]-2-Naphthalenesulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are available upon request to support your quality assurance and regulatory compliance 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from 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	Contact for details
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.