Description

7-[[4-[[4-[(4-Aminobenzoyl)Amino]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]-1,3-Naphthalenedisulfonic 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 specific color properties and its role as a key building block in the synthesis of more complex dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and stable colorants. Consistent quality and reliable supply are critical for ensuring batch-to-batch reproducibility in final product formulations.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial precursor in the synthesis of acid dyes and direct dyes, particularly for coloring polyamide fibers like nylon and wool.
• Textile Industry: Used in the manufacturing of dyes for textiles, leather, and paper, offering good wash and light fastness properties.
• Ink Formulation: Employed in the production of colorants for inks, including those used in packaging and specialty printing.
• Research & Development: Utilized in chemical research as a model compound for studying azo coupling reactions and dye chemistry.
• Specialty Chemical Synthesis: Acts as a building block for creating more complex functional dyes used in analytical chemistry or as biological stains.

Basic Information

Item	Detail
Product Name	7-[[4-[[4-[(4-Aminobenzoyl)Amino]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]-1,3-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	6949-09-3
Molecular Formula	C31H24N6Na2O7S2
Molecular Weight	702.66 g/mol
Synonyms	Acid Orange 156; C.I. 26501; Disodium 7-[[4-[[4-[(4-aminobenzoyl)amino]-2-methylphenyl]azo]-2-methylphenyl]azo]-1,3-naphthalenedisulfonate; 1,3-Naphthalenedisulfonic acid, 7-[[4-[[4-[(4-aminobenzoyl)amino]-2-methylphenyl]azo]-2-methylphenyl]azo]-, disodium salt; Azo dye intermediate 6949-09-3; 4-Amino-N-[4-[(2-methyl-4-[(2-methylphenyl)azo]phenyl)azo]phenyl]benzamide-7,7'-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of 7-[[4-[[4-[(4-Aminobenzoyl)Amino]-2-Methylphenyl]Azo]-2-Methylphenyl]Azo]-1,3-Naphthalenedisulfonic Acid Disodium Salt adheres to stringent quality protocols to ensure high purity and batch consistency suitable for industrial synthesis. Each lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet precise customer specifications. A Certificate of Analysis (COA) detailing identity, purity, and related substances is provided with every shipment to support your quality assurance processes.

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 after opening to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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