Description

4-amino-5-hydroxy-6-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-[[4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonic acid is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its ability to impart specific, vibrant shades and excellent fastness properties when incorporated into final dye formulations. This compound is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for coloring cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of pigments for inks in digital, packaging, and industrial printing applications.
• Specialty Coatings: Serves as a colorant precursor in coatings for paper, leather, and other specialty surfaces.
• Research & Development: Employed in chemical research for developing novel dye structures and studying azo dye chemistry.
• Functional Dyes: Potential use in the synthesis of dyes for non-textile applications, such as in optical media or sensors.

Basic Information

Item	Details
Product Name	4-amino-5-hydroxy-6-[[2-methoxy-5-methyl-4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-3-[[4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonic acid
CAS No.	85959-30-4
Molecular Formula	C34H32N6O18S4
Molecular Weight	940.90 g/mol
Synonyms	Reactive Black 5 (precursor); C.I. 20505; Disodium 4-amino-5-hydroxy-3,6-bis[[4-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-2,7-naphthalenedisulfonate; Tetrasodium 6-amino-4-hydroxy-3,7-bis[[4-[(2-sulfonatooxyethyl)sulfonyl]phenyl]azo]-2,8-naphthalenedisulfonate; Azo dye intermediate 85959-30-4; 4-Amino-3,6-bis[(4-((2-sulfooxyethyl)sulfonyl)phenyl)azo]-5-hydroxy-2,7-naphthalenedisulfonic acid
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance 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 sealed to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (Water)	Completely 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.