Description

5-[[2,4-Dihydroxy-3,5-Bis[(2-Hydroxy-3,5-Dinitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, complex azo dye intermediate known for its intense color properties and chemical stability. This compound is critical for synthesizing specialized dyes and pigments that require high lightfastness and thermal resistance. It is primarily sought by manufacturers in the textile, ink, and advanced materials industries for producing high-performance colorants.

Application

• Textile Dyeing: As a key intermediate for producing high-grade, wash-fast azo dyes for synthetic and natural fibers.
• Ink Formulation: Used in the synthesis of pigments for industrial printing inks, including packaging and security inks.
• Advanced Materials: Serves as a functional colorant in the development of specialty coatings and polymers.
• Research & Development: A valuable chemical for academic and industrial R&D in organic synthesis and color chemistry.
• Analytical Chemistry: Potential use as a chromogenic agent or indicator in specific analytical methods.

Basic Information

Item	Details
Product Name	5-[[2,4-Dihydroxy-3,5-Bis[(2-Hydroxy-3,5-Dinitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	72765-45-8
Molecular Formula	C40H20N12O22S2Na2
Molecular Weight	Contact for details
Synonyms	Acid Black 210; C.I. 300310; Disodium 5-[[2,4-dihydroxy-3,5-bis[(2-hydroxy-3,5-dinitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonate; 2,7-Naphthalenedisulfonic acid, 5-[[2,4-dihydroxy-3,5-bis[(2-hydroxy-3,5-dinitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-, sodium salt (1:2); Azo Black 210; Leather Black 210; Pigment Black 210 intermediate
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Every batch is analyzed to confirm identity, purity, and consistency. Certificates of Analysis (COA) are available upon request, detailing key parameters such as assay, impurity profile, and physical characteristics to meet the stringent requirements of our global B2B clients.

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 to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark colored powder
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.