Description

7,7'-Iminobis[4-Hydroxy-3-[(2-Hydroxyphenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its ability to impart vibrant and stable color properties, making it a critical precursor for the synthesis of specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of complex, high-value azo dyes for textiles and leather.
• Specialty Pigment Manufacturing: Used in the production of pigments for inks, coatings, and plastics requiring specific color fastness and stability.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional dyes with tailored properties.
• Analytical Reagent: Can be utilized as a colorimetric reagent or indicator in specific analytical chemistry applications.
• Functional Material Synthesis: Potential use in the creation of dyes for optical data storage, sensors, or other advanced material systems.

Basic Information

Product Name	7,7'-Iminobis[4-Hydroxy-3-[(2-Hydroxyphenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt
CAS No.	82944-43-2
Molecular Formula	C34H22N4O10S2Na2
Molecular Weight	748.66 g/mol
Synonyms	Acid Black 234; C.I. 31741; 7,7'-Iminobis[4-hydroxy-3-(2-hydroxyphenylazo)-2-naphthalenesulfonic acid] disodium salt; Disodium 7,7'-(iminobis(4-hydroxy-3-((2-hydroxyphenyl)azo)naphthalene-2-sulfonate); Azo dye intermediate 82944-43-2; Bis(4-hydroxy-3-((2-hydroxyphenyl)azo)-2-naphthalenesulfonic acid) 7,7'-iminobis disodium salt
EINECS	Contact for details

Quality Control

Our 7,7'-Iminobis[4-Hydroxy-3-[(2-Hydroxyphenyl)Azo]-2-Naphthalenesulfonic Acid]Disodium Salt is manufactured under a strict quality management system. Each 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 all relevant parameters is provided with every shipment.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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