Description

Tetrasodium 4,4'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis[3-Amino-5-Hydroxynaphthalene-2,7-Disulphonate] is a high-purity, water-soluble anionic dye intermediate. This compound is valued for its role as a critical precursor in the synthesis of high-performance dyes and pigments, particularly reactive and direct dyes for textiles. It is essential for manufacturers in the textile, leather, and specialty chemical industries seeking to produce vibrant, colorfast shades. Its consistent quality ensures reliable performance in demanding industrial applications.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the manufacture of reactive dyes for cotton, viscose, and other cellulosic fibers.
• Direct Dye Synthesis: Used in the production of direct dyes for paper, leather, and textile applications requiring high substantivity.
• Specialty Pigment Manufacturing: Serves as a precursor for creating complex organic pigments used in inks, coatings, and plastics.
• Laboratory & Research: Employed in chemical research and development for synthesizing novel chromophores and studying azo dye chemistry.
• Analytical Chemistry: Can be used as a standard or reagent in specific colorimetric analytical methods.

Basic Information

Product Name	Tetrasodium 4,4'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis[3-Amino-5-Hydroxynaphthalene-2,7-Disulphonate]
CAS No.	6771-81-9
Molecular Formula	C34H20N8Na4O16S4
Molecular Weight	~ 1010.86 g/mol
Synonyms	Acid Blue 92, Tetrasodium Salt; C.I. 13390; Direct Blue 86; 4,4'-[Carbonylbis(imino-4,1-phenyleneazo)]bis[3-amino-5-hydroxynaphthalene-2,7-disulfonic acid] tetrasodium salt; Benzenesulfonic acid, 4,4'-[carbonylbis[imino(4,1-phenylene)azo]]bis[3-amino-5-hydroxy-, tetrasodium salt; C.I. Acid Blue 92; Pontacyl Blue Black SX
EINECS	229-859-1

Quality Control

Our production of Tetrasodium 4,4'-[Carbonylbis(Imino-4,1-Phenyleneazo)]Bis[3-Amino-5-Hydroxynaphthalene-2,7-Disulphonate] adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Completely 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.