Description

4,4'-Bis[4-[3-acetylamino-4-[4,8-di(sodiosulfo)-2-naphtylazo]anilino]-6-(3-carboxylatopyridinio)-1,3,5-triazin-2-ylamino]-2,2'-stilbenedisulfonic acid 2,2'-disodium salt is a high-purity, water-soluble anionic dye belonging to the stilbene and triazine chemical classes. This compound is engineered to deliver exceptional color strength and stability, making it a critical component for demanding technical applications. It is primarily sought by manufacturers in the textile, specialty paper, and advanced material coating industries where consistent performance and quality are paramount.

Application

• Textile Dyeing and Printing: As a high-grade dye for natural and synthetic fibers, offering excellent wash and light fastness.
• Paper and Pulp Coloring: Used in the production of specialty papers, including security papers and decorative laminates.
• Functional Material Coatings: Imparts color in coatings for plastics, leather, and other industrial materials.
• Biological Staining Reagent: Potential use as a specialized stain in histology and microscopy due to its specific chromophore structure.
• Optical Brightener/Additive: Can be utilized in formulations requiring specific fluorescent or light-absorbing properties.
• Research & Development: Serves as a key intermediate or reference standard in chemical synthesis and analytical method development.

Basic Information

Product Name	4,4'-Bis[4-[3-acetylamino-4-[4,8-di(sodiosulfo)-2-naphtylazo]anilino]-6-(3-carboxylatopyridinio)-1,3,5-triazin-2-ylamino]-2,2'-stilbenedisulfonic acid 2,2'-disodium salt
CAS No.	101948-59-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Direct Yellow 142; Direct Yellow 142; Stilbene triazine dye; 4,4'-Bis[4-[3-acetylamino-4-[4,8-disulfo-2-naphthylazo]phenylamino]-6-(3-carboxypyridinio)-s-triazin-2-ylamino]stilbene-2,2'-disulfonic acid disodium salt; 2,2'-Stilbenedisulfonic acid, 4,4'-bis[4-[3-(acetylamino)-4-[4,8-disulfo-2-naphthalenyl)azo]phenyl]amino]-6-(3-carboxy-1-pyridinio)-1,3,5-triazin-2-yl]amino]-, sodium salt (1:2); Reactive Yellow Dye; Anionic Triazinyl Stilbene Dye
EINECS	Contact for details

Quality Control

Our production of this dye adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed for critical parameters including purity, color value, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance and regulatory compliance needs.

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 material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 90.0%
Moisture Content	≤ 8.0%
Water Solubility	Freely soluble
Ash Content (Sulfated)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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