Description

Trisodium 5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble synthetic organic dye belonging to the azo class, distinguished by its complex polyazo structure and multiple sulfonate groups. This compound is engineered to deliver exceptional color strength, lightfastness, and thermal stability in demanding industrial applications. It is a critical component for manufacturers in the textile, leather, paper, and specialty ink industries seeking reliable and consistent coloring agents.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly cotton, wool, and nylon, offering vibrant shades with good wash fastness.
• Leather Finishing: Used in the coloration of leather goods, providing uniform and deep penetration for a consistent finish.
• Paper Coloring: Imparts color to high-grade papers, including specialty packaging and decorative papers.
• Ink Manufacturing: A key pigment for producing industrial inks, including those for flexographic and inkjet printing.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Serves as a standard or intermediate in chemical research for developing new dyes and functional materials.

Basic Information

Item	Detail
Product Name	Trisodium 5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	94135-86-1
Molecular Formula	C39H24N8Na3O16S4
Molecular Weight	1086.88 g/mol (approx.)
Synonyms	Acid Black 210; C.I. 300310; Trisodium 4-hydroxy-3-[(4-methoxyphenyl)azo]-5-[[2,4-dihydroxy-5-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]phenyl]azo]naphthalene-2,7-disulfonate; Leather Black RL; Polyazo Black Dye; 5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Methoxyphenyl)Azo]Naphthalene-2,7-Disulphonic Acid Trisodium Salt
EINECS	Contact for details

Quality Control

Our production of this azo dye adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed for critical parameters including color strength, purity, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing assay, heavy metal content, and specific identification tests is provided with each shipment to support your quality assurance processes.

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 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%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Completely soluble
Ash Content	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm

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