This Basic Blue 9 (Methylene Blue Bb) is widely used in various industries, including textile, paper, and printing. This dye is characterized by its deep blue color and is soluble in water, making it easy to use and apply. It is also known for its good light-fastness and resistance to fading, ensuring that it retains its color over time. This Basic Blue 9 (Methylene Blue Bb) has excellent dyeing properties, including even penetration and high dye exhaustion, making it an ideal choice for many applications.