Description

4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxy-4-Sulphophenyl)Azo]-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulpho-2-Naphthyl)Azo]Naphthalene-2-Sulphonic Acid is a high-purity, multi-sulfonated azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart excellent color fastness, water solubility, and strong chromophore properties in advanced dye synthesis. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance dyes and pigments. Consistent quality and reliable supply are critical for ensuring batch-to-batch uniformity in final colored products.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-grade reactive dyes for cotton, wool, and nylon textiles, offering brilliant shades and superior wash-fastness.
• Specialty Ink Production: Manufacturing of inks for jet printing, packaging, and security applications requiring specific color properties and stability.
• Functional Pigment Development: Used in the research and production of pigments for plastics, coatings, and advanced materials.
• Laboratory & Analytical Reagent: Serves as a standard or reference compound in analytical chemistry and quality control laboratories for dye analysis.
• Research & Development: Key building block in academic and industrial R&D for developing novel chromophores and functional dyes.

Basic Information

Product Name	4-Hydroxy-7-[[[[5-Hydroxy-6-[(2-Methoxy-4-Sulphophenyl)Azo]-7-Sulpho-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulpho-2-Naphthyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	94022-36-3
Molecular Formula	C38H25N7O16S4
Molecular Weight	995.89 g/mol
Synonyms	Reactive Black 5 Intermediate; C.I. Reactive Black 5 (key intermediate); Tetrasulfonated Bisazo Dye Intermediate; 4-Hydroxy-3-[(6-sulfo-2-naphthyl)azo]-7-[[[[5-hydroxy-6-[(2-methoxy-5-sulfophenyl)azo]-7-sulfo-2-naphthyl]amino]carbonyl]amino]-2-naphthalenesulfonic Acid; Azo Dye Precursor 94022-36-3; Multi-sulfonated Naphthalene Azo Compound; Black 5 Dye Manufacturing Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure purity and performance consistency for industrial applications. Each batch is analyzed using advanced techniques like HPLC and spectrophotometry to verify critical parameters such as assay, impurity profile, and color strength. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory compliance 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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, the container should be opaque or stored in dark conditions to prevent degradation.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Completely soluble

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