Description

Acid Red 163 is a synthetic azo dye belonging to the acid dye class, valued for its bright red color and good affinity for protein-based fibers like wool, silk, and nylon. Its primary commercial value lies in providing vibrant, wash-fast coloration for textiles, leather, and paper, with specific formulations also finding use in specialized industrial applications. This product is essential for manufacturers in the textile dyeing, leather finishing, and specialty ink industries seeking reliable and consistent colorants.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing good leveling and wash-fastness properties.
• Leather Coloring: Used in the finishing process to impart a uniform red color to leather goods.
• Paper Staining: Employed for coloring specialty papers, including decorative and packaging materials.
• Ink Formulation: A component in the manufacture of certain inks for non-impact printing and specialty markers.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Can be used to provide a red hue to wood surfaces in decorative applications.

Basic Information

Product Name	Acid Red 163
CAS No.	13421-53-9
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 163; C.I. 24790; Acid Leather Red G; Naphthalene Red G; Acid Fast Red G; Azo Rubine G; C.I. Acid Red 163; 6-Amino-4-hydroxy-3-[(4-sulfophenyl)azo]-5-[(2,4,6-trimethylphenyl)azo]-2,7-naphthalenedisulfonic acid, disodium salt
EINECS	236-517-8

Quality Control

Our Acid Red 163 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 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
Color Strength	100% ± 3% (vs. Standard)
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm

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