Description

Basic Blue 7-P is a synthetic cationic dye belonging to the triarylmethane class, widely recognized for its intense blue coloration. This high-purity colorant is essential for applications requiring consistent, vibrant shades and excellent fastness properties. It is a critical raw material for manufacturers in the textile, paper, and specialty ink industries seeking reliable and uniform dye performance.

Application

• Textile Dyeing: Primary application for dyeing acrylic, modacrylic, and cationic-dyeable polyester fibers to achieve bright blue shades.
• Paper Coloring: Used in the production of colored papers, tissues, and specialty packaging materials.
• Ink Manufacturing: A key pigment for formulating writing inks, stamp pad inks, and other aqueous-based ink systems.
• Leather Finishing: Employed in the dyeing of leather goods to provide rich, uniform blue colors.
• Biological Staining: Utilized in histological and microbiological laboratories as a staining agent for microscopic analysis.
• Specialty Coatings: Incorporated into coatings and paints where specific colorimetric properties are required.

Basic Information

Product Name	Basic Blue 7-P
CAS No.	371231-05-9
Molecular Formula	C20H26ClN3O
Molecular Weight	359.89 g/mol
Synonyms	Basic Blue 7; Victoria Pure Blue BO; C.I. 42595; Aizen Victoria Pure Blue BOH; Astrazon Blue BG; Basic Blue 7 (C.I. 42595); 4-[(4-Dimethylamino)phenyl][4-(ethylamino)-1-naphthyl]methylene]-2,5-cyclohexadien-1-ylidene]dimethylammonium chloride
EINECS	Contact for details

Quality Control

Our Basic Blue 7-P is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous in-house specifications, which typically include identification, assay, and impurity profile analysis. 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). Keep away from incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Dark green to blue powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Water Solubility	Freely soluble
Ash Content	≤ 0.5%

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