Description

2-Hydroxy-5-[[4'-[(2-Hydroxy-3,6-Disulfo-1-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]Benzoic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart vibrant and stable coloration, particularly in shades of red and violet, due to its complex chromophoric structure. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance dyes and pigments.

Application

• Textile Dyeing: A key intermediate for synthesizing direct, acid, and reactive dyes used on cotton, wool, silk, and nylon fibers.
• Ink Formulation: Used in the production of pigments for printing inks, including those for packaging and security applications.
• Leather Coloring: Employed in the manufacture of dyes for coloring leather goods with good fastness properties.
• Paper Staining: Serves as a colorant for specialty papers and paper products requiring specific hue requirements.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Utilized as a standard or intermediate in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	2-Hydroxy-5-[[4'-[(2-Hydroxy-3,6-Disulfo-1-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]Benzoic Acid Trisodium Salt
CAS No.	6548-26-1
Molecular Formula	C29H17N4Na3O11S2
Molecular Weight	746.53 g/mol
Synonyms	Acid Red 289; C.I. 17415; Trisodium 5-[(E)-[4-[(E)-2-hydroxy-3,6-disulfonato-1-naphthyl)diazenyl]biphenyl-4-yl]diazenyl]salicylate; Benzoic acid, 2-hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-, trisodium salt; 1-Naphthalenesulfonic acid, 2-[(E)-[4'-[(1-carboxy-2-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]diazenyl]-3-hydroxy-6-sulfo-, trisodium salt
EINECS	229-476-2

Quality Control

Our production of 2-Hydroxy-5-[[4'-[(2-Hydroxy-3,6-Disulfo-1-Naphtyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]Benzoic Acid Trisodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and compliance with industry standards. Every lot is analyzed for critical parameters including purity, heavy metal content, and specific absorbance. Certificates of Analysis (COA) detailing all test results are available upon request 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 each use to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark red to violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	25.0 - 35.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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