Description

Catonic Dark Yellow 2Rl is a synthetic cationic dye belonging to the azo dye class, identified by CAS No. 12768-85-3. This product is valued for its strong affinity to negatively charged substrates, providing excellent color fastness and vivid, durable coloration. It is primarily required by manufacturers in the textile, paper, and leather industries for dyeing and printing applications where consistent, high-quality yellow hues are essential.

Application

• Textile Dyeing: Primary application for dyeing acrylic, modified polyamide, and polyester fibers to achieve deep, lightfast yellow shades.
• Paper Coloration: Used in the production of specialty papers, including decorative and packaging papers, where cationic properties ensure good retention.
• Leather Finishing: Imparts rich, uniform color to leather goods, offering good penetration and rub fastness.
• Ink Formulation: A key component in the manufacture of inks for non-impact printing and specialty markers.
• Biological Staining: Potential use as a cationic stain in histology and microbiology for contrast enhancement.
• Plastics and Polymers: For mass coloration of certain cationic-dyeable polymers.

Basic Information

Product Name	Catonic Dark Yellow 2Rl
CAS No.	12768-85-3
Molecular Formula	C21H25N5O6S2 • 2Cl (Typical for related cationic azo dyes)
Molecular Weight	Contact for details
Synonyms	Cationic Dark Yellow 2RL; Basic Dark Yellow 2RL; Aizen Cathilon Yellow 2RL-H; Astrazon Yellow 2RL; Maxilon Yellow 2RL; Sevron Yellow 2RL; C.I. Basic Yellow 28; 1H-Pyrazolium, 3-[(4-aminophenyl)azo]-1,2-dimethyl-, salt (1:2)
EINECS	Contact for details

Quality Control

Our production of Catonic Dark Yellow 2Rl adheres to stringent quality management protocols. Every batch is tested for critical parameters including color strength, shade, solubility, and impurity profile to ensure batch-to-batch consistency and compliance with industry specifications. Certificates of Analysis (COA) documenting purity, physical properties, and performance characteristics are available upon request.

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). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark Yellow to Brown Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Ash Content	≤ 1.0%
pH (1% Solution)	4.0 - 7.0

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