Description

C.I. Basic Blue 140 is a synthetic cationic dye belonging to the triarylmethane class, known for its intense blue color and affinity for polyacrylonitrile fibers. This compound is valued for its excellent tinctorial strength and good fastness properties, making it a critical component in high-quality dyeing processes. It is primarily utilized by manufacturers in the textile industry for dyeing acrylic fibers, as well as by producers of specialty inks, paper, and leather.

Application

• Textile Dyeing: Primary application for dyeing acrylic, modacrylic, and other cationic-dyeable synthetic fibers.
• Ink Manufacturing: Used as a colorant in the production of specialty inks, including security inks and inkjet formulations.
• Paper Coloration: Employed for tinting and surface coloring of paper products where a bright blue hue is required.
• Leather Finishing: Applied in the dyeing of leather goods to achieve consistent and vibrant blue shades.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its cationic nature.
• Plastics and Polymers: Can be used for mass coloration of certain plastics and polymers during manufacture.

Basic Information

Product Name	C.I. Basic Blue 140
CAS No.	61724-62-7
Molecular Formula	C20H26N3O4S+ • Cl-
Molecular Weight	415.95 g/mol (for cation)
Synonyms	Basic Blue 140; Astrazon Blue BG; Aizen Cathilon Blue BG; Maxilon Blue BG; Cationic Blue BG; 4-[(4-Dimethylamino)phenyl][4-(ethylamino)-1-naphthyl]methylene]-2,5-cyclohexadien-1-ylidene]dimethylammonium chloride; C.I. 51004
EINECS	262-993-7

Quality Control

Our production of C.I. Basic Blue 140 adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed for critical parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, assay, and physical specifications are provided with every 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to greenish-blue powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
Ash Content	≤ 1.0%

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