Description

Disodium 4-Hydroxy-3-[[4'-[(2-Hydroxynaphthyl)Azo]-2,2'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical precursor for producing vivid and stable colorants. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop high-performance pigments and dyes with specific hue and fastness characteristics.

Application

• Primary Intermediate for Azo Pigments: Serves as a key building block in the synthesis of high-performance organic pigments, particularly for yellows, oranges, and reds.
• Textile Dye Manufacturing: Used in the production of dyes for coloring natural and synthetic fibers, valued for color strength and wash-fastness.
• Inkjet and Printing Inks: A crucial component in formulating advanced inks for digital and industrial printing, contributing to color gamut and stability.
• Plastics and Polymer Coloring: Employed in the masterbatch production for coloring plastics like polyolefins, PVC, and engineering polymers.
• Specialty Coatings and Paints: Used to manufacture pigments for automotive, industrial, and decorative coatings requiring durability and weatherability.
• Research & Development: Serves as a standard or experimental compound in chemical R&D for developing new colorants and studying azo chemistry.

Basic Information

Product Name	Disodium 4-Hydroxy-3-[[4'-[(2-Hydroxynaphthyl)Azo]-2,2'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonate
CAS No.	3701-40-4
Molecular Formula	C34H22N4Na2O8S2
Molecular Weight	724.66 g/mol
Synonyms	Pigment Yellow 12 Intermediate; C.I. 21090; Disodium 4-hydroxy-3-[(E)-[4-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl]-2,2'-dimethyl[1,1'-biphenyl]-4-yl]diazenyl]naphthalene-2,7-disulfonate; 2,2'-Dimethyl-4,4'-bis(2-hydroxy-1-naphthylazo)-1,1'-biphenyl-3,3'-dicarboxylic Acid Disodium Salt Derivative; Azoic Diazo Component 12; Yellow 12 Lake Precursor; Diarylamide Yellow Intermediate
EINECS	223-039-8

Quality Control

Our production of Disodium 4-Hydroxy-3-[[4'-[(2-Hydroxynaphthyl)Azo]-2,2'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) detailing assay, impurity profile, and physical characteristics are provided with each shipment to guarantee traceability and compliance with industry standards.

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 nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product performance and handling. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Orange to Reddish-Brown Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Moisture (KF Titration)	≤ 5.0%
Solubility (in Water)	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.