Description

4-Hydroxy-3-[[4'-[[4-[(1-Hydroxy-4-Sodiosulfo-2-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1-Sulfonic Acid Sodium Salt is a high-purity, synthetic azo dye intermediate of significant industrial importance. This compound is valued for its role in producing vivid and stable colorants, particularly in applications requiring specific shade and fastness properties. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries for the synthesis of high-performance dyes and pigments.

Application

• Primary Intermediate for Textile Dyes: A key building block in the synthesis of high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Pigment Manufacturing: Used in the production of organic pigments for industrial paints, inks, and plastics, where color consistency is critical.
• Specialty Ink Formulations: Employed in the development of high-performance inks for packaging, security printing, and digital applications.
• Leather and Paper Coloring: Serves as an intermediate for dyes used in the leather tanning and high-quality paper industries.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry.

Basic Information

Item	Detail
Product Name	4-Hydroxy-3-[[4'-[[4-[(1-Hydroxy-4-Sodiosulfo-2-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1-Sulfonic Acid Sodium Salt
CAS No.	13195-20-5
Molecular Formula	C52H34N6Na2O10S2
Molecular Weight	989.0 g/mol
Synonyms	Direct Brown 1; C.I. 30045; Direct Brown 1, disodium salt; Direct Brown 1 Sodium Salt; 4-Hydroxy-3-((4'-((4-((1-hydroxy-4-sodiosulfo-2-naphthyl)azo)-1-naphthyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)-1-naphthalenesulfonic acid sodium salt; C.I. Direct Brown 1; Benzo Brown G; Chloramine Brown G
EINECS	236-155-5

Quality Control

Our production of 4-Hydroxy-3-[[4'-[[4-[(1-Hydroxy-4-Sodiosulfo-2-Naphthalenyl)Azo]-1-Naphthalenyl]Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1-Sulfonic Acid Sodium Salt adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent shade strength, and compliance with industry specifications. Comprehensive Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided to guarantee traceability and product integrity for your manufacturing 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 performance.

Specification

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

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