Description

3-Hydroxy-4-[[4'-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonic Acid is a high-purity, complex azo dye intermediate essential for producing vivid and stable colorants. Its multi-sulfonated, polyaromatic structure provides excellent water solubility and strong substantivity, making it a critical building block for advanced dyes. This compound is primarily required by manufacturers in the textile, ink, and specialty chemical industries seeking to develop high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: A key precursor in the synthesis of high-quality reactive dyes for cotton and cellulose fiber dyeing and printing.
• Manufacture of Acid Dyes: Used in the production of acid dyes for coloring wool, silk, and nylon, offering good lightfastness and washfastness.
• Specialty Ink Formulations: Serves as a crucial component in the development of specialized inks for digital textile printing and security applications.
• Functional Pigment Synthesis: Acts as a starting material for creating complex organic pigments with specific coloristic and performance properties.
• Research & Development: Utilized in chemical R&D laboratories for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Chemistry Reagent: May be employed as a staining agent or a complexometric indicator in specific analytical procedures.

Basic Information

Product Name	3-Hydroxy-4-[[4'-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonic Acid
CAS No.	63216-84-2
Molecular Formula	C41H28N6O13S3
Molecular Weight	909.88 g/mol
Synonyms	Acid Black 210; C.I. 300310; 3-Hydroxy-4-[(4'-{[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthyl]azo}-3,3'-dimethoxy[1,1'-biphenyl]-4-yl)azo]naphthalene-2,7-disulfonic acid; 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[[4'-[[1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-; C.I. Acid Black 210; Black 210 (Acid); Azo Dye Intermediate 63216-84-2
EINECS	Contact for details

Quality Control

Our production of 3-Hydroxy-4-[[4'-[[1-Hydroxy-6-(Phenylamino)-3-Sulpho-2-Naphthyl]Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. The material is characterized and tested against rigorous in-house specifications, which are aligned with industry standards for dye intermediates. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to guarantee traceability and compliance.

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 to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (typical 97-99%)
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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