Description

Acid Blue 25 is a synthetic anthraquinone acid dye known for its bright blue hue and good lightfastness. This colorant is valued for its ability to produce vibrant and durable shades on protein fibers like wool, silk, and nylon. It is a critical component for manufacturers in the textile, leather, and paper industries seeking high-quality, consistent coloration. Our supply of Acid Blue 25 (CAS No. 37218-11-4) ensures reliable performance for demanding dyeing and printing applications.

Application

Acid Blue 25 is primarily used as a colorant in various industrial processes. Its key applications include:

• Textile Dyeing: For coloring natural protein fibers such as wool and silk, as well as synthetic polyamide fibers like nylon.
• Leather Finishing: Imparts a rich blue color to leather goods, including apparel, footwear, and upholstery.
• Paper Coloring: Used in the production of specialty papers, including decorative and packaging materials.
• Ink Formulation: A pigment source for certain types of inks, including those for non-impact printing.
• Biological Staining: Employed in histology and microscopy as a staining agent for tissue samples.
• Polymer Coloring: For tinting specific engineering plastics and synthetic fibers during manufacture.

Basic Information

Product Name	Acid Blue 25
CAS No.	37218-11-4
Molecular Formula	C20H13N2NaO5S
Molecular Weight	416.38 g/mol
Synonyms	Acid Blue 25; C.I. 62055; Sodium 1-amino-4-(cyclohexylamino)-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate; Acid Blue AS; Anthraquinone Blue AS; Amacid Blue A; Telon Blue ANL; Suracid Blue A; Dermacid Blue 2B; Lissamine Blue B; Acid Leather Blue A
EINECS	253-417-1

Quality Control

Our Acid Blue 25 is produced and tested under a strict quality management system. Each batch is analyzed to ensure it meets precise color strength, shade, and chemical purity specifications critical for consistent industrial application. Certificates of Analysis (COA) documenting key parameters such as assay, solubility, and impurity profiles are available upon request 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
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%

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