Description

C.I. Basic Blue 42 is a synthetic cationic dye belonging to the triarylmethane class, widely recognized for its brilliant blue hue and strong affinity for polyacrylonitrile fibers. This product is essential for achieving consistent, high-quality coloration with excellent fastness properties in demanding industrial applications. It is primarily utilized by manufacturers in the textile, paper, and specialty ink industries seeking reliable and vibrant blue colorants.

Application

• Textile Dyeing: Primary application for dyeing acrylic, modacrylic, and other cationic-dyeable synthetic fibers, offering good light and wash fastness.
• Paper Coloring: Used in the production of colored papers, tissues, and specialty paper products where a bright blue shade is required.
• Ink Manufacturing: A key component in the formulation of inks for ballpoint pens, stamp pads, and other writing instruments.
• Leather Finishing: Employed in the dyeing of leather goods to provide uniform and durable blue coloration.
• Biological Staining: Finds use in histological and microbiological laboratories as a staining agent for microscopic analysis.
• Plastics and Polymers: Can be used for mass coloration of certain plastics where compatibility is confirmed.

Basic Information

Product Name	C.I. Basic Blue 42
CAS No.	12768-81-9
Molecular Formula	C20H26N3O·Cl
Molecular Weight	359.89 g/mol (as chloride salt)
Synonyms	Basic Blue 42; Astrazon Blue BG; Aizen Cathilon Blue BG; Maxilon Blue BG; C.I. 42560; Victoria Pure Blue BO; 4-[(4-Dimethylaminophenyl)[4-(ethylamino)-1-naphthyl]methylene]-N-ethylcyclohexa-2,5-dien-1-iminium chloride
EINECS	235-825-6

Quality Control

Our C.I. Basic Blue 42 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous internal specifications for key parameters such as color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee it meets your specific application 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). Keep away from strong oxidizing agents. The material is light-sensitive; prolonged exposure to light should be avoided to prevent degradation of color strength.

Specification

Item	Specification
Appearance	Dark blue to greenish-blue powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%

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