Description

Acid Red 92 is a synthetic, water-soluble azo dye belonging to the acid dye class, known for its bright and vivid red color. It is valued for its strong affinity for protein fibers like wool, silk, and nylon, as well as its use in coloring other substrates. This dye is essential for manufacturers and processors in the textile, leather, paper, and specialty ink industries seeking reliable and consistent coloration. Its properties make it suitable for applications requiring good light and wash fastness.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, nylon, and other polyamide fibers to achieve bright red shades.
• Leather Coloring: Used in the dyeing of leather goods, including footwear, apparel, and upholstery.
• Paper Staining: Employed for coloring paper products, specialty papers, and decorative tissues.
• Ink Formulation: A colorant for specialty inks, including inks for ballpoint pens, stamp pads, and other stationery.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Cosmetics & Personal Care: Used in the formulation of certain cosmetic products, such as hair dyes and soaps, where approved.

Basic Information

Product Name	Acid Red 92
CAS No.	18472-87-2
Molecular Formula	C₂₀H₁₂N₂Na₂O₇S₂
Molecular Weight	502.42 g/mol
Synonyms	Acid Red 92; Eosin Y; Eosine Yellowish; C.I. 45380; Bromoeosine; Eosin Yellowish; Eosin (Yellowish); 2',4',5',7'-Tetrabromofluorescein disodium salt; Eosin Y, water soluble
EINECS	242-349-1

Quality Control

Our Acid Red 92 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. While available in standard commercial grade, production can be aligned with specific customer requirements. A Certificate of Analysis (COA) detailing purity, physical properties, and test results is provided with every shipment.

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. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Clear solution at 1%
Ash Content	Max. 15%
Heavy Metals (as Pb)	Max. 20 ppm

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