Description

Basic Yellow 40 is a synthetic cationic dye belonging to the azo and methine chemical classes. This high-purity colorant is valued for its strong, vibrant yellow hue and excellent substantivity to various substrates, making it a critical component in specialized industrial coloring processes. It is primarily utilized by manufacturers in the textile, paper, and specialty chemical sectors seeking reliable and consistent color performance.

Application

• Textile Dyeing and Printing: Used for dyeing acrylic, modified polyamide, and polyester fibers, as well as for printing applications.
• Paper Coloring: Employed in the production of colored papers, tissues, and specialty paper products.
• Leather Finishing: Applied in the dyeing of leather goods to achieve bright yellow shades.
• Ink Manufacturing: Serves as a colorant for the formulation of inks, including for ballpoint pens and markers.
• Biological Staining: Used in histology and microbiology as a staining agent for microscopic analysis.
• Specialty Chemical Synthesis: Acts as an intermediate or colorant in the synthesis of other complex chemical products.

Basic Information

Product Name	Basic Yellow 40
CAS No.	35869-60-4
Molecular Formula	C21H29ClN2O3
Molecular Weight	392.92 g/mol
Synonyms	Aizen Cathilon Yellow 5GLH; Astrazon Yellow 5GL; Basic Yellow 5G; Basacryl Yellow 5GL; C.I. 48054; Maxilon Yellow 5GL; Pyrocatechol Violet; 2-[[4-(Diethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazol-3-ium chloride
EINECS	Contact for details

Quality Control

Our Basic Yellow 40 is produced under a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against comprehensive specifications, including identity, assay, and impurity profiles. A Certificate of Analysis (COA) detailing the results is provided with every shipment to guarantee compliance with your technical requirements.

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 nature, the container must be kept tightly sealed after use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Water Content (Karl Fischer)	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility	Soluble in water and ethanol

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