Description

Disodium 5-[[4-[[4-[[6-[(4-Amino-3-Methylbenzoyl)Amino]-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]-3-Methylbenzoyl]Amino]Phenyl]Azo]Salicylate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing specialized dyes and pigments, offering excellent color strength and stability. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Key intermediate for the synthesis of azo dyes and pigments used in textile coloration.
• Used in the production of specialty inks, including those for packaging and security printing applications.
• Acts as a precursor for functional dyes in research and development of new optical materials.
• Employed in the manufacturing of colorants for plastics and polymers.
• Potential use in the formulation of biological stains and indicators for laboratory analysis.
• Serves as a critical building block for high-value, complex dye molecules with specific light-fastness and chemical resistance properties.

Basic Information

Product Name	Disodium 5-[[4-[[4-[[6-[(4-Amino-3-Methylbenzoyl)Amino]-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]-3-Methylbenzoyl]Amino]Phenyl]Azo]Salicylate
CAS No.	72152-67-1
Molecular Formula	C39H28N6Na2O10S
Molecular Weight	818.72 g/mol
Synonyms	Acid Red 337; C.I. 17200; Disodium 6-[(4-Amino-3-methylbenzoyl)amino]-4-hydroxy-3-[[4-[[4-[(2-hydroxy-3,5-disulfobenzoyl)amino]phenyl]azo]-3-methylbenzoyl]amino]-2-naphthalenesulfonate; 5-[[4-[[4-[[6-[(4-Amino-3-methylbenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthyl]azo]-3-methylbenzoyl]amino]phenyl]azo]salicylic acid disodium salt; Azo dye intermediate 72152-67-1; C.I. Acid Red 337
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is tested against comprehensive specifications, including identity, assay, and impurity profiles. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with 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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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