Description

1-Naphthalenesulfonic Acid, 4-Hydroxy-3-[[4-[[[3-[[2- (Sulfooxy)Ethyl]Sulfonyl]Phenyl]Amino]Carbonyl]Phenyl ]Azo]-, Disodium Salt is a high-purity, water-soluble azo dye intermediate and reactive chemical building block. This compound is valued for its ability to impart color and functionality in advanced synthetic processes, offering excellent batch-to-batch consistency for industrial applications. It is primarily utilized by manufacturers in the dyes and pigments, textile chemicals, and specialty polymer sectors.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-performance, fiber-reactive dyes used in textile coloring.
• Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics.
• Textile Auxiliary Chemicals: Serves as a functional component in dye-fixing agents and other textile processing aids.
• Specialty Polymer Modification: Acts as a functional monomer or cross-linking agent to introduce sulfonate groups for enhanced water solubility or ionic character.
• Laboratory Research: Employed as a standard or reagent in chemical research and development for novel chromophores.
• Analytical Chemistry: Potential use as a colorimetric reagent or indicator in specific analytical methods.

Basic Information

Product Name	1-Naphthalenesulfonic Acid, 4-Hydroxy-3-[[4-[[[3-[[2- (Sulfooxy)Ethyl]Sulfonyl]Phenyl]Amino]Carbonyl]Phenyl ]Azo]-, Disodium Salt
CAS No.	113833-54-8
Molecular Formula	C25H19N3Na2O11S3
Molecular Weight	703.60 g/mol
Synonyms	Reactive Black 5 (Parent dye analog); 4-Hydroxy-3-((4-((3-((2-sulfooxyethyl)sulfonyl)phenyl)carbamoyl)phenyl)azo)naphthalene-1-sulfonic acid disodium salt; C.I. Reactive Black 5 intermediate; Disodium 4-hydroxy-3-((4-((3-((2-sulfonatooxyethyl)sulfonyl)phenyl)carbamoyl)phenyl)azo)naphthalene-1-sulfonate; Azo dye intermediate 113833-54-8; Sulfonated azo dye precursor; Textile dye intermediate
EINECS	Contact for details

Quality Control

Our production of this specialty intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing purity, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and compliance.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Freely soluble in water

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