Description

Pentasodium 2-[[1-Hydroxy-3,6-Disulphonato-8-[[3-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Benzoyl]Amino]-2-Naphthyl]Azo]Naphthalene-1,5-Disulphonate is a high-purity, water-soluble reactive dye intermediate characterized by its complex poly-sulfonated azo structure. This compound is engineered to deliver exceptional color strength, brightness, and superior wash-fastness when covalently bonded to cellulosic fibers. It is a critical component for manufacturers requiring high-performance and environmentally compliant dyeing solutions in the textile and specialty chemical industries.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-grade reactive dyes used in cotton, viscose, and other cellulosic fiber dyeing and printing.
• Textile Industry: Imparts brilliant and durable shades, particularly reds and blues, with excellent stability to washing and light.
• Specialty Ink Formulation: Used in the production of inks for jet printing and other applications requiring high color purity and solubility.
• Research & Development: Serves as a reference standard and starting material for developing novel chromophores and functional dyes in analytical and material science.
• Leather Processing: Employed in the dyeing of leather to achieve deep, uniform, and fast colors.
• Paper Coloring: Suitable for high-quality paper where bright, water-fast coloration is required.

Basic Information

Item	Details
Product Name	Pentasodium 2-[[1-Hydroxy-3,6-Disulphonato-8-[[3-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Benzoyl]Amino]-2-Naphthyl]Azo]Naphthalene-1,5-Disulphonate
CAS No.	97043-71-5
Molecular Formula	C35H21N4Na5O22S5
Molecular Weight	Approx. 1194.93 g/mol
Synonyms	Reactive Red 250; C.I. Reactive Red 250; 2-Naphthalenesulfonic acid, 7-[[8-[[3-[(2-sulfooxyethyl)sulfonyl]benzoyl]amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-1,5-disulfo-, pentasodium salt; Pentasodium 7-[[8-[[3-[(2-sulfooxyethyl)sulfonyl]benzoyl]amino]-1-hydroxy-3,6-disulfo-2-naphthyl]azo]naphthalene-1,5-disulphonate; Reactive Dye Intermediate 97043-71-5; RR250
EINECS	Contact for details

Quality Control

Every batch of our Pentasodium 2-[[1-Hydroxy-3,6-Disulphonato-8-[[3-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Benzoyl]Amino]-2-Naphthyl]Azo]Naphthalene-1,5-Disulphonate is manufactured and tested under a strict quality management system. We ensure compliance with industry specifications for dye intermediates, focusing on consistent purity and chromatic performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with each shipment to guarantee traceability and product integrity.

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 incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
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.