Description

Acid Red 279 CAS NO 12220-27-8 is a synthetic, water-soluble azo dye belonging to the acid dye class, valued for its bright and vivid red color. It is engineered to deliver excellent color strength, good lightfastness, and reliable batch-to-batch consistency, which are critical for industrial applications. This dye is primarily used by manufacturers in the textile, leather, and paper industries seeking high-performance, cost-effective coloring solutions.

Application

• Textile Dyeing: Primary application for dyeing protein fibers like wool, silk, and nylon, offering good wash and light fastness.
• Leather Finishing: Used for coloring leather goods, providing uniform and deep shades with good adhesion.
• Paper Coloration: Suitable for tinting paper pulp and surface coating to produce colored papers and specialty packaging.
• Ink Manufacturing: A key component in the formulation of inks for markers, stamp pads, and other specialty applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Polymer Tinting: For imparting color to certain plastics and polymers during manufacturing.

Basic Information

Product Name	Acid Red 279
CAS No.	12220-27-8
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 279; C.I. Acid Red 279; Acid Leather Red 2G; Acid Leather Red G; Acid Leather Red GN; Acid Red G; Acid Leather Red 2GN; 2,7-Naphthalenedisulfonic acid, 5-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-4-hydroxy-3-[(2-methylphenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our Acid Red 279 is manufactured under a stringent quality management system to ensure it meets the high standards required for industrial dyeing applications. Each batch is tested for critical parameters including color strength, shade, solubility, and impurity profile to guarantee consistent performance and reliable results in your process. A comprehensive Certificate of Analysis (COA) documenting purity, physical properties, and conformance to specification 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 dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
Ash Content	≤ 1.0%

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