Description

C.I.Acid Blue 233 is a synthetic acid dye belonging to the anthraquinone chemical class, valued for its bright and stable blue hue. It is a critical component for achieving consistent, high-quality coloration with excellent fastness properties in demanding industrial applications. This dye is primarily required by manufacturers in the textile, leather, and paper industries for dyeing natural and synthetic polyamide fibers.

Application

• Primary dyeing of nylon, silk, and wool textiles.
• Coloration of leather goods, including apparel, footwear, and accessories.
• Production of specialty and decorative paper products.
• Ink formulation for specific printing applications requiring acid dyes.
• Dyeing of polyamide-based technical fabrics and carpets.
• As a colorant in the manufacture of wood stains and coatings.

Basic Information

Product Name	C.I.Acid Blue 233
CAS No.	12234-68-3
Molecular Formula	C20H14N2Na2O8S2
Molecular Weight	528.44 g/mol
Synonyms	Acid Blue 233; Acid Blue N-BL; C.I. 62055; Acid Leather Blue N-BL; Anthraquinone Blue AS; Sodium 1-amino-4-(3-((4-sulfophenyl)amino)phenyl)amino-9,10-dihydro-9,10-dioxoanthracene-2-sulfonate; Acid Blue AS; Nylosan Blue N-BL
EINECS	Contact for details

Quality Control

Our production of C.I.Acid Blue 233 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters for color strength, shade, and purity. A comprehensive Certificate of Analysis (COA) detailing these results is provided with each shipment 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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Contact for details

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