Description

1,4-Benzenedisulfonic Acid, 2-[[4-[[4-[[(2,3-Dichloro- 6-Quinoxalinyl)Carbonyl]Amino]-5-Sulfo-1-Naphthalenyl ]Azo]-7-Sulfo-1-Naphthalenyl]Azo]-, Tetrasodium Salt is a high-purity, water-soluble synthetic dye intermediate belonging to the class of polyazo compounds. This compound is valued for its excellent chromophore properties and strong affinity for various substrates, making it a critical precursor in the production of specialized dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries for developing vivid and durable colorants.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-performance inks for digital, packaging, and security printing applications.
• Industrial Pigments: Serves as a precursor for creating organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for specialty and decorative papers.
• Research & Development: Acts as a standard or building block in chemical research for developing new chromogenic materials.

Basic Information

Item	Detail
Product Name	1,4-Benzenedisulfonic Acid, 2-[[4-[[4-[[(2,3-Dichloro- 6-Quinoxalinyl)Carbonyl]Amino]-5-Sulfo-1-Naphthalenyl ]Azo]-7-Sulfo-1-Naphthalenyl]Azo]-, Tetrasodium Salt
CAS No.	72639-37-3
Molecular Formula	C41H20Cl2N8Na4O16S4
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (Tetrasodium Salt); C.I. 20505; Tetrasodium 4-amino-5-hydroxy-3-[[4-[[2-(sulfonatooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate; Benzenesulfonic acid, 2-[[4-[[4-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-5-sulfo-1-naphthalenyl]azo]-7-sulfo-1-naphthalenyl]azo]-, tetrasodium salt; 1,3-Benzenedisulfonic acid, 4-amino-5-hydroxy-6-phenylazo-2,7-disulfo-, tetrasodium salt (related isomer); Polyazo dye intermediate; Tetrasodium 1,4-benzenedisulfonate azo dye.
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and reliability. Every lot undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color strength, and elemental analysis. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profiles is provided with each shipment to support your quality assurance protocols.

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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Water Content (KF)	≤ 5.0%
Ash Content	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Completely soluble

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