Description

4-Amino-3,6-Bis[[4-[[4-Chloro-6-[(3-Sulphophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]-2-Sulphophenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, complex organic dye intermediate belonging to the class of reactive azo dyes. This compound is critically important for its ability to form strong covalent bonds with textile fibers, resulting in exceptional color fastness and wash resistance. It is primarily sought after by manufacturers in the textile and specialty chemical industries for producing vibrant, durable dyes and pigments.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-performance reactive dyes used in cotton, wool, and nylon dyeing.
• Textile Coloration: Imparts bright, wash-fast colors to fabrics, essential for the production of high-quality apparel and home textiles.
• Leather Dyeing: Used in formulations for dyeing leather goods, providing deep penetration and color stability.
• Paper Coloring: Employed in the production of specialty colored papers where color consistency is required.
• Ink Manufacturing: Serves as a colorant component in the formulation of certain industrial inks.
• Research & Development: Used in chemical research for developing new chromophores and studying dye-polymer interactions.

Basic Information

Product Name	4-Amino-3,6-Bis[[4-[[4-Chloro-6-[(3-Sulphophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]-2-Sulphophenyl]Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	51357-74-5
Molecular Formula	C44H28Cl2N16O16S6
Molecular Weight	1356.06 g/mol
Synonyms	Reactive Black 5 Intermediate; C.I. Reactive Black 5 (precursor); 4-Amino-5-hydroxy-3,6-bis((4-((4-chloro-6-((3-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino)-2-sulfophenyl)diazenyl)naphthalene-2,7-disulfonic acid; Remazol Black B Intermediate; Vinylsulfone Reactive Dye Intermediate; Azo Triazine Dye Intermediate; C.I. 20505 (related); Dye Intermediate CAS 51357-74-5
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Every lot is tested against established specifications for identity, assay, and impurity profiles using advanced analytical techniques like HPLC. A Certificate of Analysis (COA) detailing all test results 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 to prevent absorption of atmospheric moisture. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Solubility (in Water)	Partially soluble, forms colloidal solution

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