Description

C.I.Acid Blue 66 is a synthetic acid dye belonging to the anthraquinone chemical class, valued for its bright and stable blue hue. It is a critical coloring agent for industrial applications requiring good lightfastness and washfastness on protein-based substrates. This product is essential for manufacturers in the textile, leather, and specialty paper industries seeking consistent, high-quality coloration. Its CAS number is 12731-52-1.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing excellent color yield and fastness properties.
• Leather Finishing: Used for coloring leather goods, offering vibrant shades with good penetration and uniformity.
• Paper Coloring: Employed in the production of specialty papers, including decorative and security papers.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its affinity for specific tissues.
• Wood Staining: Applied for tinting wood and wood-based products to achieve desired aesthetic effects.

Basic Information

Product Name	C.I.Acid Blue 66
CAS No.	12731-52-1
Molecular Formula	C32H26N4Na2O8S2
Molecular Weight	696.68 g/mol
Synonyms	Acid Blue 66; C.I. 62105; Acid Blue AS; Alizarine Brilliant Blue BS; Amacid Blue BS; Anthraquinone Blue SWF; Atul Acid Blue BS; Derma Fur Blue 2B; Hexacol Blue BS; Kiton Blue BS; Lissamine Blue BS; Naphthazine Blue BS; Sandolan Blue E-BSL; Suracid Blue BS; Telon Blue BRN
EINECS	235-822-8

Quality Control

Our production of C.I.Acid Blue 66 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing these specifications is provided with each shipment to support your quality assurance processes.

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 strong oxidizing agents. The material is light-sensitive; prolonged exposure to direct light should be avoided to prevent degradation.

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%
Heavy Metals (as Pb)	≤ 20 ppm

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