Description

C.I. Acid Blue 239 is a high-purity synthetic dye belonging to the anthraquinone acid dye class, identified by CAS NO 12219-42-0. It is valued for its excellent color fastness, brilliant blue shade, and strong affinity for protein-based and polyamide fibers. This dye is essential for manufacturers in the textile, leather, and specialty paper industries seeking consistent, vibrant coloration with reliable performance.

Application

• Primary dyeing and printing of wool and silk textiles.
• Coloration of nylon and other synthetic polyamide fibers.
• Leather finishing for high-quality apparel, upholstery, and accessories.
• Manufacturing of specialty and decorative papers.
• Ink formulation for specific technical and industrial marking applications.
• Potential use as a colorant in biological staining for microscopy (subject to specific purity grades).

Basic Information

Item	Detail
Product Name	C.I. Acid Blue 239
CAS No.	12219-42-0
Molecular Formula	C32H26N4Na2O8S2
Molecular Weight	696.68 g/mol
Synonyms	Acid Blue 239; C.I. 62045; Acid Blue Z-BG; Aminyl Blue F-GL; Kayanol Blue N-G; Nylosan Blue N-BLN; Telon Blue ANL; Acid Leather Blue BG; 1,4-Bis[(2,4-diaminophenyl)amino]anthraquinone-2,6-disulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Blue 239 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Each lot is tested for critical parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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.

Specification

Item	Specification
Appearance	Dark blue powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 50 ppm

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