Description

Disodium 6-[[2,4-Dihydroxy-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(2-Hydroxy-3-Nitro-5-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate characterized by its complex polyazo structure and multiple sulphonate groups, which impart excellent water solubility. This compound is valued for its ability to produce vivid and stable hues, making it a critical component in the formulation of specialized dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require consistent color strength and performance in demanding applications.

Application

• Textile Dyeing: As a key intermediate for producing high-performance, wash-fast azo dyes for synthetic and natural fibers.
• Ink Manufacturing: Used in the synthesis of pigments for industrial inks, including those for packaging and printing.
• Specialty Coatings: Serves as a colorant precursor in coatings for plastics, leather, and other substrates requiring specific color properties.
• Research & Development: Employed as a standard or reagent in chemical research focused on dye chemistry and photophysical properties.
• Analytical Chemistry: Potential use as a colorimetric indicator or tracer in specific analytical methodologies.

Basic Information

Product Name	Disodium 6-[[2,4-Dihydroxy-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(2-Hydroxy-3-Nitro-5-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate
CAS No.	97337-89-8
Molecular Formula	C34H20N8Na2O16S3
Molecular Weight	954.78 g/mol
Synonyms	Disodium 6-[[2,4-dihydroxy-3-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(2-hydroxy-3-nitro-5-sulfonatophenyl)azo]naphthalene-2-sulfonate; C.I. Pigment Red 187; C.I. 12467; Pigment Red 187; Azo Dye Intermediate PR 187; 6-[[2,4-Dihydroxy-3-[(4-nitrophenyl)azo]phenyl]azo]-4-hydroxy-3-[(2-hydroxy-3-nitro-5-sulfonatophenyl)azo]naphthalene-2-sulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of Disodium 6-[[2,4-Dihydroxy-3-[(4-Nitrophenyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(2-Hydroxy-3-Nitro-5-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for color value and chemical composition. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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). This product is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed when not in use to prevent degradation and moisture absorption.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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