Description

Acid Blue 328 is a synthetic organic dye belonging to the anthraquinone class, known for its vibrant blue hue and excellent color fastness properties. This high-performance colorant is engineered to deliver consistent, reliable coloration in demanding industrial applications. It is primarily utilized by manufacturers in the textile, leather, and specialty ink industries seeking durable and vivid blue shades.

Application

• Textile Dyeing: Used for dyeing polyester, nylon, and acetate fibers, providing excellent wash and light fastness.
• Leather Finishing: Imparts rich, uniform color to finished leather goods, including upholstery, footwear, and accessories.
• Ink Manufacturing: Serves as a key pigment for specialty inks, including those for packaging, security printing, and plastics.
• Plastics and Polymers: Employed for the mass coloration of various plastic resins to achieve consistent blue tones.
• Paper Coloring: Used in the production of specialty colored papers and paper products.
• Research & Development: Acts as a standard or intermediate in chemical synthesis and analytical method development.

Basic Information

Product Name	Acid Blue 328
CAS No.	85205-17-0
Molecular Formula	C22H14N2Na2O8S2
Molecular Weight	576.46 g/mol
Synonyms	Acid Blue 328; C.I. 621055; Anthraquinone Blue 328; Sodium 1-amino-4-[(4-aminophenyl)amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonate; Acid Leather Blue 2R; Telon Blue ANL; Supranol Blue BL; Nylosan Blue N-BL
EINECS	286-370-8

Quality Control

Our Acid Blue 328 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous internal specifications for color strength, purity, and solubility. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters 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 such as strong oxidizing agents. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3%
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.