Description

5-Amino-4-Hydroxy-3-[[4'-[(1-Hydroxy-4-Sulfonaphthalen-2-Yl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. This compound is valued for its role in synthesizing complex dyes with excellent light and wash fastness properties. It is primarily required by manufacturers in the textile, ink, and specialty pigment industries seeking consistent quality for their production processes.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance, polyazo direct and reactive dyes for textiles like cotton and viscose.
• Textile Dye Manufacturing: Used to produce dyes that offer strong color strength, brightness, and good fastness to light and washing.
• Inkjet and Printing Ink Formulation: Serves as a precursor for colorants used in high-quality inks, providing excellent solubility and color purity.
• Specialty Pigment Production: Employed in the manufacture of pigments for plastics, coatings, and other industrial applications requiring specific hue and stability.
• Research & Development: Used in chemical R&D labs for developing new dye structures and studying azo coupling reactions.
• Biological Staining: Potential use as an intermediate for synthesizing stains used in histology and microscopy.

Basic Information

Product Name	5-Amino-4-Hydroxy-3-[[4'-[(1-Hydroxy-4-Sulfonaphthalen-2-Yl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt
CAS No.	6420-09-3
Molecular Formula	C34H23N5O11S3Na3
Molecular Weight	860.79 g/mol
Synonyms	Direct Blue 71 (Intermediate); C.I. 34140; Trisodium 5-amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethylbiphenyl-4-yl]azo]naphthalene-2,7-disulphonate; 3-[[4'-[(7-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-4,5-dihydroxynaphthalene-2,7-disulfonic Acid Trisodium Salt; Azo Dye Intermediate 6420-09-3; 5-Amino-4-hydroxy-3-[2-[4-[[2-(1-hydroxy-4-sulfo-2-naphthyl)diazenyl]-2-methylphenyl]phenyl]diazenyl]naphthalene-2,7-disulfonic Acid Trisodium Salt
EINECS	229-178-9

Quality Control

Our 5-Amino-4-Hydroxy-3-[[4'-[(1-Hydroxy-4-Sulfonaphthalen-2-Yl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-2,7-Naphthalenedisulfonic Acid Trisodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee it meets your technical requirements.

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 product is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	20.0% - 25.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble, clear solution

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