Description

Acid Red 111 is a synthetic, water-soluble azo dye belonging to the acid dye class, widely recognized for its vibrant red color. It is valued for its strong affinity to protein fibers like wool, silk, and nylon, providing excellent colorfastness and brightness. This dye is essential for manufacturers in the textile, leather, and paper industries seeking reliable and consistent red coloration for their products. Its compatibility with various dyeing processes makes it a versatile choice for industrial applications.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, offering good wash and light fastness.
• Leather Finishing: Used for coloring leather goods, providing rich and uniform red shades.
• Paper Staining: Employed in the production of colored papers, specialty packaging, and decorative items.
• Ink Formulation: A colorant component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Cosmetic Additive: Used in limited, approved applications for coloring soaps and other cosmetic products.

Basic Information

Product Name	Acid Red 111
CAS No.	6358-57-2
Molecular Formula	C30H21N5Na2O8S2
Molecular Weight	681.62 g/mol
Synonyms	Acid Red 111; C.I. Acid Red 111; C.I. 23266; Acid Leather Red BG; Naphthalene Scarlet 4R; Acid Fast Red E; Eriosin Red B; Lissamine Red 2B; Acid Brilliant Red E; Wool Red B; Supranol Fast Red BW; Telon Fast Red F-BW
EINECS	228-785-8

Quality Control

Our Acid Red 111 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot undergoes comprehensive analysis, including purity assay, shade verification, and strength testing against industry standards. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your specifications and quality requirements.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade & Strength	Within agreed tolerance vs. standard
pH (1% Solution)	6.0 - 8.0

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