Description

Acid Blue 20 is a synthetic acid dye belonging to the anthraquinone class, valued for its bright blue hue and good lightfastness. Its primary commercial value lies in its ability to provide vibrant, durable coloration to protein-based fibers like wool and silk, as well as to polyamide fibers. This dye is essential for manufacturers in the textile, leather, and specialty paper industries seeking consistent, high-quality blue shades. The compound is supplied under the identifier CAS NO 8004-99-7.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a bright blue color.
• Leather Finishing: Used in the coloration of leather goods, providing rich and even blue tones.
• Paper Staining: Employed for coloring specialty papers, including decorative and security papers.
• Ink Formulation: A colorant component in the manufacture of certain inks and toners.
• Biological Staining: Potential use as a histological stain in laboratory settings.
• Polymer Coloring: Can be used for mass coloration of specific polyamide plastics.

Basic Information

Product Name	Acid Blue 20
CAS No.	8004-99-7
Molecular Formula	C20H13N2NaO5S
Molecular Weight	416.38 g/mol
Synonyms	Acid Blue 20; Alizarine Brilliant Blue BS; C.I. 20425; Acid Blue BS; Anthraquinone Blue BS; Wool Blue BS; Nylosan Blue N-BL; Supranol Blue BLW; Telon Blue ANL
EINECS	232-339-4

Quality Control

Our Acid Blue 20 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with every shipment to support your quality assurance protocols.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark blue powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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