Description

Disodium 5-Hydroxy-6-[[2-Methoxy-5-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalenesulphonate is a high-purity, water-soluble azo dye intermediate known for its excellent chromophore properties and stability. This compound is critical for manufacturers requiring precise color development and consistent batch-to-batch performance in demanding applications. It is primarily utilized by producers of reactive dyes, textile colorants, and specialty inks who value supply chain reliability and stringent quality control.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton, wool, and nylon.
• Textile Colorant Production: Used in manufacturing dyes for the textile industry, offering bright shades and good wash-fastness.
• Specialty Ink Formulations: Employed in the production of inks for digital textile printing and other industrial marking applications.
• Paper Coloring: Suitable for the manufacture of dyes used in high-quality paper and packaging.
• Leather Dyeing: Acts as an intermediate for dyes applied in the leather tanning and finishing industry.
• Research & Development: Serves as a standard or precursor in chemical R&D for developing new chromophores and functional dyes.

Basic Information

Product Name	Disodium 5-Hydroxy-6-[[2-Methoxy-5-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalenesulphonate
CAS No.	19526-81-9
Molecular Formula	C19H16N2Na2O12S3
Molecular Weight	614.48 g/mol
Synonyms	Reactive Dye Intermediate 19526-81-9; 5-Hydroxy-6-[(2-methoxy-5-[(2-sulfooxyethyl)sulfonyl]phenyl)azo]-1,3-naphthalenedisulfonic acid disodium salt; C.I. Reactive Orange 16 intermediate; Disodium 6-[(5-[(2-sulfatoethyl)sulfonyl]-2-methoxyphenyl)azo]-5-hydroxy-1,3-naphthalenedisulfonate; Azo dye intermediate for textiles; Acid Dye Intermediate; Sulfonated azo dye precursor
EINECS	Contact for details

Quality Control

Our production of Disodium 5-Hydroxy-6-[[2-Methoxy-5-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]Naphthalenesulphonate adheres to a rigorous quality management system. Every batch is tested to ensure it meets precise specifications for purity, color strength, and solubility. Certificates of Analysis (COA) documenting key parameters 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). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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