Description

C.I. Basic Yellow 39 is a synthetic cationic dye belonging to the methine class, widely recognized for its bright and vibrant yellow hue. This product is valued for its strong affinity to polyacrylonitrile and other synthetic fibers, delivering excellent color fastness properties. It is a critical component for dye houses and chemical manufacturers serving the textile, paper, and specialty ink industries globally. The compound is supplied as a high-purity powder to ensure consistent batch-to-batch performance in demanding industrial applications.

Application

• Textile Dyeing: Primary application for dyeing acrylic fibers, modacrylics, and certain polyesters, providing excellent light and wash fastness.
• Paper Coloring: Used in the production of specialty papers, including decorative and security papers, where a bright yellow color is required.
• Ink Manufacturing: A key pigment for formulating inks used in flexographic, gravure, and inkjet printing applications.
• Leather Finishing: Employed in the dyeing of leather goods to achieve consistent and durable yellow shades.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Plastics and Polymers: Incorporated for mass coloration of plastics where a stable yellow colorant is needed.

Basic Information

Product Name	C.I. Basic Yellow 39
CAS No.	12221-85-1
Molecular Formula	C21H29N3O4S
Molecular Weight	419.54 g/mol
Synonyms	Basic Yellow 39; Aizen Cathilon Yellow 3GLH; Astrazon Yellow 3GL; Maxilon Yellow 3GL; Sevron Yellow L; C.I. 48054; 1H-Benz[e]indolium, 2-[2-[4-(dimethylamino)phenyl]ethenyl]-1,3,3-trimethyl-, methyl sulfate; 2-[2-[4-(Dimethylamino)phenyl]ethenyl]-1,3,3-trimethyl-1H-benz[e]indolium methyl sulfate
EINECS	Contact for details

Quality Control

Our production of C.I. Basic Yellow 39 adheres to stringent quality management protocols to ensure it meets the high standards required for industrial dye applications. Each batch is analyzed for critical parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, physical properties, and performance characteristics are available upon request 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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	Max. 5.0%
Ash Content	Max. 1.0%
Solubility (in water)	Clear solution
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.