Description

3-[[4-[[4-[Ethyl[(4-Sulphophenyl)Methyl]Amino]Phenyl]Azo]-1-Naphthyl]Azo]Benzenesulphonic Acid is a high-purity, synthetic organic dye intermediate belonging to the azo chemical class. This compound is valued for its strong chromophoric properties and its role as a key precursor in the synthesis of complex, high-performance dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries for producing vivid and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of acid dyes and direct dyes for textile fibers like nylon, silk, and wool.
• Pigment Manufacturing: Used in the production of organic pigments for inks, including printing inks and packaging inks, requiring high color strength.
• Specialty Coatings: Employed in the formulation of industrial and automotive coatings where specific color fastness and durability are required.
• Research & Development: Utilized in chemical R&D laboratories for developing novel chromophores and studying azo coupling reactions.
• Paper Coloring: Can be used in the manufacture of dyes for specialty paper products.
• Biological Staining: Potential application as a staining agent in histological studies due to its azo structure, though specific grades would be required.

Basic Information

Product Name	3-[[4-[[4-[Ethyl[(4-Sulphophenyl)Methyl]Amino]Phenyl]Azo]-1-Naphthyl]Azo]Benzenesulphonic Acid
CAS No.	85959-35-9
Molecular Formula	C32H29N5O6S2
Molecular Weight	643.73 g/mol
Synonyms	Acid Black 210; C.I. 300310; Benzenesulfonic acid, 3-[[4-[[4-[ethyl[(4-sulfophenyl)methyl]amino]phenyl]azo]-1-naphthalenyl]azo]-; 3-((4-((4-(Ethyl((4-sulfophenyl)methyl)amino)phenyl)diazenyl)-1-naphthyl)diazenyl)benzenesulfonic acid; Azo Black 210; Dye Intermediate 85959-35-9; 1-Naphthalenesulfonic acid derivative
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is tested against established specifications for identity, assay, and impurity profiles using advanced analytical techniques. A Certificate of Analysis (COA) detailing all test results is provided with each 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
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.