Description

Tetrasodium 8-[[4-[(4-Amino-3-Sulphonatophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-5-[[6-(Benzoylamino)-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]Naphthalene-2-Sulphonate is a high-purity, polyazo dye intermediate of significant industrial importance. This compound is valued for its ability to impart exceptional color strength and stability in demanding applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent performance in their formulations.

Application

• Textile Dyeing: A key intermediate for producing high-grade, wash-fast reactive and direct dyes for cotton, wool, and nylon.
• Ink Manufacturing: Used in the synthesis of pigments for industrial inks, including those for packaging and digital printing.
• Specialty Coatings: Serves as a colorant precursor in coatings requiring specific hue and lightfastness properties.
• Paper Coloring: Employed in the production of dyes for high-quality paper and board.
• Leather Finishing: Used in dye formulations for achieving deep, uniform colors on leather goods.
• Research & Development: A critical compound for R&D laboratories developing new colorants and functional dyes.

Basic Information

Item	Detail
Product Name	Tetrasodium 8-[[4-[(4-Amino-3-Sulphonatophenyl)Azo]-6-Sulphonatonaphthyl]Azo]-5-[[6-(Benzoylamino)-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]Naphthalene-2-Sulphonate
CAS No.	70210-31-0
Molecular Formula	C49H30N8Na4O17S5
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (Tetrasodium Salt); C.I. 20505; Tetrasodium 4-Amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylazo)-2,7-naphthalenedisulfonate (related isomer); Polyazo Dye Intermediate; Tetrasodium 1-amino-4-[[4-[(2,4-disulfophenyl)azo]phenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulfonate (common trade name base); Azo Dye Precursor; Direct Black 22 (Tetrasodium Salt variant); Tetrasodium Salt of Azo Dye Acid
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems. Every 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 each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place 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.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	7.0 - 9.0

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