Description

Acid Red 118 is a synthetic azo dye belonging to the acid dye class, valued for its bright red hue and strong affinity for protein-based fibers like wool, silk, and nylon. Its primary commercial value lies in providing excellent colorfastness and level dyeing properties in textile applications. This dye is essential for manufacturers in the textile, leather, and paper industries seeking vibrant and durable red coloration.

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 shades.
• Paper Staining: Employed in the production of colored papers and paper products.
• Ink Formulation: A colorant component in certain types of inks for specialized printing.
• Biological Staining: Potential use as a histological stain in laboratory settings.
• Polymer Coloring: Can be used to color specific synthetic polymers and plastics.

Basic Information

Product Name	Acid Red 118
CAS No.	12217-35-5
Molecular Formula	C20H13N4NaO5S
Molecular Weight	452.40 g/mol
Synonyms	Acid Red 118; C.I. Acid Red 118; Acid Leather Red G; Naphthalene Red G; Wool Red G; Acid Fast Red G; C.I. 18055; Sodium 5-[(2,4-dinitrophenyl)azo]salicylate
EINECS	Contact for details

Quality Control

Our Acid Red 118 is manufactured under a strict 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. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee it meets your specific application 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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 1.0%

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