Description

C.I. Acid Blue 280 is a synthetic acid dye belonging to the anthraquinone chemical class, valued for its bright and stable blue coloration. This high-performance dye is engineered to deliver excellent fastness properties, including strong lightfastness and washfastness, making it a reliable choice for demanding applications. It is primarily utilized in the textile industry for dyeing protein fibers like wool and silk, as well as in the coloration of leather, paper, and certain specialty inks.

Application

• Dyeing of natural protein fibers such as wool and silk.
• Coloration of leather and fur products.
• Manufacturing of colored paper and specialty paper products.
• Production of inks for stamp pads and other specialty writing instruments.
• Dyeing of nylon fibers where applicable acid dye formulations are used.
• As a colorant in the manufacture of certain cosmetic and personal care items.
• Used in laboratory and industrial settings as a stain or biological marker.
• Potential use in the coloration of food packaging materials (subject to regulatory compliance).

Basic Information

Product Name	C.I. Acid Blue 280
CAS No.	39279-67-9
Molecular Formula	C32H26N4Na2O8S2
Molecular Weight	696.66 g/mol
Synonyms	Acid Blue 280; C.I. 61211; Acid Anthraquinone Blue BL; Telon Blue ANL; Nylosan Blue N-BL; Erionyl Blue A-2G; Supranol Blue BLW; Dermacid Blue 2G; Leather Blue A-2G; 1,4-Bis[(2,4-dimethylphenyl)amino]anthraquinone-2-sulfonic acid disodium salt
EINECS	254-418-6

Quality Control

Our production of C.I. Acid Blue 280 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Each lot is analyzed against comprehensive specifications for color strength, shade, solubility, and impurity profiles. Certificates of Analysis (COA) documenting purity, assay, and relevant physical-chemical parameters are available for all commercial shipments 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 incompatible materials and sources of ignition. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Dark blue powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Assay (HPLC)	≥ 95.0%
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.