Description

Acid Blue 138 is a synthetic anthraquinone-based acid dye known for its bright, clear blue shade and excellent fastness properties. It is a critical component for achieving durable and vibrant coloration in a variety of polyamide and protein-based substrates. This high-performance dye is essential for manufacturers in the textile, leather, and paper industries seeking reliable colorants with good light and wash fastness. Its consistent quality ensures reproducible results in demanding industrial dyeing and printing processes.

Application

• Primary dyeing and printing of nylon and other polyamide fibers.
• Coloration of wool, silk, and other protein-based textiles.
• Leather dyeing for footwear, apparel, and upholstery applications.
• Paper coloration for specialty and decorative papers.
• Ink formulations for specific marking and writing instruments.
• As a colorant for anodized aluminum in certain industrial finishes.

Basic Information

Product Name	Acid Blue 138
CAS No.	1324-53-4
Molecular Formula	C32H26N4Na2O8S2
Molecular Weight	696.66 g/mol
Synonyms	Acid Blue AR; C.I. Acid Blue 138; Acid Blue A; Nylosan Blue N-BL; Telon Blue ANL; Supranol Blue BLW; Anthraquinone Blue AR; 1-Amino-4-(3-((4-anilinophenyl)amino)propylamino)-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid disodium salt
EINECS	215-363-5

Quality Control

Our Acid Blue 138 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against stringent internal specifications for key parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application performance 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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Shade	Conforms to Standard
Solubility in Water	Conforms
Fastness Properties (Light, Wash)	≥ Grade 4 (Typical)

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