Description

Tetrasodium 4,5-Dihydroxy-3,6-Bis[(4-Nitro-2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing complex, high-performance dyes and pigments, particularly those requiring specific color fastness and stability properties. It is a critical raw material for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce vivid and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for inks, coatings, and plastics that demand excellent color strength.
• Textile Dyeing and Printing: Serves as a precursor for dyes used in textile coloration processes requiring bright shades and good wash-fastness.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and applications.
• Analytical Chemistry: Can be utilized as a standard or reagent in specific colorimetric analytical methods.

Basic Information

Product Name	Tetrasodium 4,5-Dihydroxy-3,6-Bis[(4-Nitro-2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	97889-99-1
Molecular Formula	C32H14N6Na4O20S4
Molecular Weight	1010.70 g/mol (approx.)
Synonyms	Acid Black 210; C.I. 300310; Tetrasodium 4,5-dihydroxy-3,6-bis[(4-nitro-2-sulfophenyl)azo]naphthalene-2,7-disulfonate; 4,5-Dihydroxy-3,6-bis[(4-nitro-2-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid tetrasodium salt; Reactive Black 5 precursor; Azo dye intermediate 97889-99-1
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 4,5-Dihydroxy-3,6-Bis[(4-Nitro-2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent moisture absorption and potential caking or degradation.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	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.