Description

Trisodium 5-Amino-3-[[4'-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color strength and stability. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and durable colorants.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality printing inks, including those for packaging and security applications.
• Pigment Production: Serves as a precursor for manufacturing organic pigments with enhanced lightfastness and weather resistance.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the production of dyes for specialty and decorative papers.
• Research & Development: Serves as a critical standard and building block in chemical R&D for novel colorant systems.

Basic Information

Item	Details
Product Name	Trisodium 5-Amino-3-[[4'-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	66214-51-5
Molecular Formula	C40H26N6Na3O13S3
Molecular Weight	Contact for details
Synonyms	5-Amino-3-{[4'-({7-amino-1-hydroxy-3-sulphonato-2-naphthyl}azo)-3,3'-dimethylbiphenyl-4-yl]azo}-4-hydroxynaphthalene-2,7-disulphonic acid trisodium salt; C.I. Direct Blue 218; Direct Blue 218; Trisodium 5-amino-3-[[4'-[(7-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethylbiphenyl-4-yl]azo]-4-hydroxynaphthalene-2,7-disulphonate; Direct Blue 218 (C.I. 24401); C.I. 24401
EINECS	Contact for details

Quality Control

Our Trisodium 5-Amino-3-[[4'-[(7-Amino-1-Hydroxy-3-Sulphonato-2-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is produced under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, color value, and performance. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are available upon request 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 product is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to moisture or light should be avoided to maintain stability and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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