Description

C.I. Acid Blue 133 is a synthetic, water-soluble acid dye belonging to the anthraquinone chemical class, known for its bright and stable blue hue. It is valued for its excellent color fastness properties, particularly to light and washing, making it a reliable choice for demanding dyeing applications. This dye is primarily used by manufacturers in the textile, leather, and paper industries seeking high-performance coloring agents.

Application

• Textile Dyeing: Primarily used for dyeing protein fibers like wool, silk, and polyamide (nylon), providing vibrant blue shades with good levelness and fastness.
• Leather Finishing: Applied in the dyeing of leather goods, including apparel, footwear, and accessories, to achieve consistent and durable coloration.
• Paper Coloration: Suitable for tinting specialty papers, decorative papers, and certain packaging materials where color stability is required.
• Ink Formulation: Can be utilized in the production of certain types of inks, including those for pens and non-impact printing, where its solubility is advantageous.
• Biological Staining (Histology): In scientific and medical laboratories, it may be employed as a staining agent for microscopic tissue analysis, capitalizing on its affinity for specific cellular structures.

Basic Information

Product Name	C.I. Acid Blue 133
CAS No.	61723-93-1
Molecular Formula	C32H26N4Na2O8S2
Molecular Weight	704.70 g/mol
Synonyms	Acid Blue 133; C.I. 62055; Acid Blue AR; Acid Leather Blue AR; Anthraquinone Blue AR; Sodium 1-amino-4-[(4-aminophenyl)amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonate; 1-Amino-4-[(4-aminophenyl)amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt
EINECS	262-966-8

Quality Control

Our C.I. Acid Blue 133 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, color strength, and application performance. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with our rigorous specifications.

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 prevent degradation.

Specification

Item	Specification
Appearance	Dark blue powder or granules
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 98%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard sample
Fastness Properties (Light, Wash)	≥ 4-5 (Standard scale)

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