C.I. Acid Blue 20, also known by its CAS number 8004-99-7, is a synthetic dye primarily used in the textile and food industries. It belongs to the class of acid dyes, which are characterized by their solubility in water and ability to bond with positively charged substrates, such as proteins and polyamide fibers. This dye exhibits a vibrant blue color and is often utilized for dyeing wool, silk, and nylon, as well as in various applications in the food industry for coloring purposes. Acid Blue 20 is known for its good lightfastness and washfastness properties, making it suitable for applications where durability is essential. However, like many synthetic dyes, it may pose environmental and health concerns, necessitating careful handling and adherence to regulatory guidelines. Its chemical structure typically includes sulfonic acid groups, which enhance its solubility in water. Overall, C.I. Acid Blue 20 is a versatile dye with significant industrial applications, but its use must be managed responsibly to mitigate potential risks.

C.I. Acid Blue 20

8004-99-7: -, Induline 5B, Induline Water Soluble, Nitro Fast Black JR, C.I. 50405, C.I. Acid Blue 20

Acid blue 20 is a reactive dye that is used in the textile and leather industries. It reacts with nitrous acid or other oxidizing agents to form a nitro group, which can be used to introduce an anion into a polymer film. The dye is also capable of forming covalent bonds with hydroxyl groups, phenoxy, and amide groups. Acid blue 20 has been shown to interact with benzyl, carboxy, and betaine groups in techniques such as nitration, esterification, and amidation. This dye is susceptible to oxidation by air and light over time.

CAS 8004-99-7: C.I. Acid Blue 20

Acid blue 20

Ref: 3D-IAA00499

Indulin B

Ref: 7W-GT7848

Acid Blue 20 ,

Ref: IN-DA003NO5