Description

Disodium Hydrogen 2-[[7-[(2-Arsonophenyl)Azo]-1,8-Dihydroxy-3,6-Disulphonato-2-Naphthyl]Azo]Benzoate is a high-purity, water-soluble azo dye intermediate characterized by its complex aromatic structure containing sulfonate and arsono functional groups. This compound is critical for synthesizing specialized dyes and pigments that require excellent lightfastness and strong chelating properties for metal ions. It is primarily utilized by manufacturers in the textile dyeing, analytical chemistry, and specialized pigment industries seeking advanced colorants and complexometric indicators.

Application

• Key Intermediate for Metal-Complex Dyes: Serves as a crucial precursor in the synthesis of pre-metallized dyes for wool, nylon, and silk, providing enhanced wash and light fastness.
• Analytical Reagent: Used as a colorimetric reagent and complexometric indicator in analytical chemistry for the detection and quantification of specific metal ions.
• Specialty Pigment Manufacturing: Employed in the production of high-performance organic pigments for inks, coatings, and plastics where specific color properties and stability are required.
• Textile Dyeing Auxiliary: Functions as a dye intermediate to create shades with improved substantivity and leveling properties on protein and polyamide fibers.
• Research & Development: Used in chemical R&D for developing new chromogenic compounds, sensors, and functional materials.

Basic Information

Item	Details
Product Name	Disodium Hydrogen 2-[[7-[(2-Arsonophenyl)Azo]-1,8-Dihydroxy-3,6-Disulphonato-2-Naphthyl]Azo]Benzoate
CAS No.	14674-83-0
Molecular Formula	C23H13AsN4Na2O11S2
Molecular Weight	714.35 g/mol
Synonyms	2-[[7-[(2-Arsonophenyl)azo]-1,8-dihydroxy-3,6-disulfo-2-naphthyl]azo]benzoic acid disodium salt; Arsenazo I; Neothorin; Thorin I; 2,7-Bis[(2-arsonophenyl)azo]chromotropic acid disodium salt; Benzenearsonic acid, 2,2'-(1,8-dihydroxy-3,6-disulfo-2,7-naphthalene bis(azo))di-, disodium salt; C.I. 43830
EINECS	Contact for details

Quality Control

Our Disodium Hydrogen 2-[[7-[(2-Arsonophenyl)Azo]-1,8-Dihydroxy-3,6-Disulphonato-2-Naphthyl]Azo]Benzoate is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing specifications such as assay, heavy metal content, and impurity profile 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, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As) Content	Conforms to theoretical range
Solubility (in Water)	Freely soluble

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