Description

Acid Red 278 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 to protein fibers like wool, silk, and nylon, providing excellent colorfastness and wash-fastness properties. This dye is essential for manufacturers in the textile, leather, and paper industries seeking high-performance, reliable coloring agents for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers and fabrics.
• Leather Finishing: Used for coloring leather goods, providing rich and durable shades.
• Paper Staining: Employed in the production of specialty colored papers and paper products.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings.
• Plastics and Polymers: Can be used for coloring certain types of plastics and synthetic materials.

Basic Information

Product Name	Acid Red 278
CAS No.	71819-56-2
Molecular Formula	C24H20N4Na2O8S2
Molecular Weight	606.55 g/mol
Synonyms	Acid Red 2G; C.I. Acid Red 278; Acid Leather Red 2G; Acid Fast Red 2G; Acid Brilliant Red 2G; Sodium 4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2-naphthalenesulfonate; 2-Naphthalenesulfonic acid, 4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our Acid Red 278 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent purity, color strength, and application performance. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, shade, solubility, and impurity profiles to guarantee it meets your specific 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). Keep away from incompatible materials and sources of ignition. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution
pH (1% Solution)	6.0 - 8.0
Ash Content	≤ 30.0%

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