Basic Blue 7, also known as C.I. 42595, is a synthetic dye belonging to the family of triarylmethane dyes. It is commonly used as a colorant in various industries, including textiles, paper, and inks. Here are some properties of Basic Blue 7:

Chemical Formula: C27H29N2O3Cl
Molar Mass: 473.99 g/mol
CAS Number: 2390-60-5

Physical Properties:

• Appearance: Basic Blue 7 is a dark blue or navy blue powder or crystals.
• Solubility: It is soluble in water, giving a blue solution. It is also soluble in alcohol and slightly soluble in acetone and ethyl acetate.
• Stability: Basic Blue 7 is generally stable under normal conditions. However, it may degrade when exposed to light, heat, or oxidizing agents.

Application and Uses:

• Textile Industry: Basic Blue 7 is commonly used to dye textiles, such as cotton, silk, wool, and nylon. It provides intense blue colors.
• Printing and Ink Industry: It is used as a colorant in the production of printing inks, including water-based and solvent-based inks.
• Paper Industry: Basic Blue 7 is utilized in the coloration of paper products, such as tissue paper, making it suitable for decorative or artistic purposes.
• Biological Staining: This dye is employed in biological staining techniques, such as the Wright stain for blood cells.
• Indicator: Basic Blue 7 can act as a pH indicator, exhibiting a color change in specific pH ranges.