Description

4-[[4-[(4-Aminophenyl)Azo]-7-Sodiosulfo-1-Naphthalenyl]Azo]-2'-Hydroxy[1,1'-Azobisnaphthalene]-6,6'-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart vibrant and stable color properties in advanced dye synthesis. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-quality reactive dyes for cotton and other cellulose fibers.
• Textile Dyeing and Printing: Used in formulations for textile dyeing and printing processes requiring excellent wash and light fastness.
• Ink Manufacturing: Serves as a crucial colorant precursor in the production of inks for packaging, publishing, and digital applications.
• Leather Coloring: Employed in the dyeing of leather goods to achieve deep, uniform shades.
• Paper Coloring: Used in the manufacture of colored papers and paper products.
• Specialty Pigments: Acts as an intermediate for creating complex organic pigments used in plastics and coatings.
• Research & Development: Serves as a standard or starting material in chemical R&D for novel chromophore development.
• Analytical Chemistry: Can be used as a reagent or standard in specific colorimetric analytical methods.

Basic Information

Product Name	4-[[4-[(4-Aminophenyl)Azo]-7-Sodiosulfo-1-Naphthalenyl]Azo]-2'-Hydroxy[1,1'-Azobisnaphthalene]-6,6'-Disulfonic Acid Disodium Salt
CAS No.	6661-87-6
Molecular Formula	C32H20N6Na2O11S3
Molecular Weight	830.70 g/mol
Synonyms	Acid Black 172; C.I. 172155; Disodium 4-[[4-[(4-aminophenyl)azo]-7-sulfo-1-naphthyl]azo]-2'-hydroxy-1,1'-azonaphthalene-6,6'-disulfonate; 2-Naphthalenesulfonic acid, 4-[[4-[(4-aminophenyl)azo]-7-sulfo-1-naphthalenyl]azo]-2'-hydroxy-1,1'-azonaphthalene-6,6'-disulfonic acid, disodium salt; C.I. Acid Black 172; Azo Black 172; Reactive Black Intermediate; [1,1'-Azobisnaphthalene]-6,6'-disulfonic acid, 4-[[4-[(4-aminophenyl)azo]-7-sulfo-1-naphthalenyl]azo]-2'-hydroxy-, disodium salt
EINECS	Contact for details

Quality Control

Our production of 4-[[4-[(4-Aminophenyl)Azo]-7-Sodiosulfo-1-Naphthalenyl]Azo]-2'-Hydroxy[1,1'-Azobisnaphthalene]-6,6'-Disulfonic Acid Disodium Salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. Certificates of Analysis (COA) detailing all test results are provided and available upon request.

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

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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