Description

4-hydroxy-5-[[2-hydroxy-4-[3-hydroxy-4-[[3-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)phenyl]azo]anilino]phenyl]azo]-3-[[4-(4-nitro-2-sulphoanilino)phenyl]azo]naphthalenedisulphonic acid, sodium salt is a high-purity, complex azo dye intermediate essential for producing vibrant and durable synthetic colors. This compound matters for its role in creating specialized dyes with excellent color fastness and application-specific properties for demanding industrial processes. It is primarily needed by manufacturers in the textile, ink, and specialty polymer industries seeking consistent, high-performance colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing high-grade, wash-fast azo dyes for natural and synthetic fibers.
• Ink Formulation: Used in the production of specialized printing inks, including those for packaging and security applications.
• Pigment Manufacturing: Serves as a precursor for creating organic pigments used in plastics, coatings, and paints.
• Leather Coloring: Employed in the synthesis of dyes for achieving deep, uniform coloration on leather goods.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying dye-sensitized systems.
• Specialty Polymers: Can be incorporated into polymer chains to create intrinsically colored or functional materials.

Basic Information

Product Name	4-hydroxy-5-[[2-hydroxy-4-[3-hydroxy-4-[[3-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)phenyl]azo]anilino]phenyl]azo]-3-[[4-(4-nitro-2-sulphoanilino)phenyl]azo]naphthalenedisulphonic acid, sodium salt
CAS No.	85631-70-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 210; Sodium 4-hydroxy-5-((2-hydroxy-4-(3-hydroxy-4-((3-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)phenyl)diazenyl)phenyl)diazenyl)-3-((4-((4-nitro-2-sulfophenyl)diazenyl)phenyl)diazenyl)naphthalene-2,7-disulfonate; Acid Black 210; Azo black dye intermediate; Disodium 4-hydroxy-3,5-bis[[4-[[3-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)phenyl]azo]-2-hydroxyphenyl]azo]-2,7-naphthalenedisulfonate (related structure); [85631-70-5]
EINECS	Contact for details

Quality Control

Our 4-hydroxy-5-[[2-hydroxy-4-[3-hydroxy-4-[[3-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)phenyl]azo]anilino]phenyl]azo]-3-[[4-(4-nitro-2-sulphoanilino)phenyl]azo]naphthalenedisulphonic acid, sodium salt is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and physical properties are available upon request to support your quality assurance protocols.

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). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals	≤ 20 ppm
Solubility	Soluble in water, alkaline solutions

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