Description

Acid Blue 220 is a synthetic, water-soluble acid dye belonging to the anthraquinone chemical class, known for its bright and stable blue hue. This high-performance dye is valued for its excellent color fastness properties, particularly its strong affinity for protein-based fibers like wool, silk, and nylon. It is a critical component for industrial manufacturers in the textile, leather, and paper industries seeking vibrant, durable coloration with good leveling and migration characteristics.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers, providing excellent wash and light fastness.
• Leather Finishing: Used for coloring leather goods, offering rich, penetrating shades with good uniformity.
• Paper Coloration: Employed in the production of specialty colored papers, including decorative and security papers.
• Ink Manufacturing: A colorant for certain types of inks requiring acid dye compatibility and stability.
• Biomedical Staining: Potential use as a biological stain in histological applications due to its selective affinity.
• Polymer Mass Coloration: Can be used for coloring synthetic polymers during the manufacturing process.

Basic Information

Product Name	Acid Blue 220
CAS No.	12219-31-7
Molecular Formula	C32H26N4Na2O8S2
Molecular Weight	696.66 g/mol
Synonyms	Acid Blue AS; C.I. 61211; Acid Blue A; Acid Blue E-AS; Sodium 1-amino-4-[(4-aminophenyl)amino]-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate; 1-Amino-4-[(4-aminophenyl)amino]-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid sodium salt; Anthraquinone Blue AS; Telon Blue A-AS
EINECS	Contact for details

Quality Control

Our Acid Blue 220 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous internal specifications for key parameters including purity, shade, strength, and solubility. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee compliance with your technical requirements.

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 product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Solubility	Clear Solution at 1%
Ash Content	≤ 1.0%

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