Description

Acid Orange 166 is a synthetic azo dye belonging to the acid dye class, known for its vibrant orange hue and excellent affinity for protein-based fibers. This high-performance colorant is valued for its strong tinctorial strength and good light and wash fastness properties, making it a reliable choice for demanding coloration processes. It is primarily utilized by manufacturers in the textile, leather, and paper industries seeking consistent and durable orange shades.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing bright and fast orange colors.
• Leather Finishing: Used in the coloration of leather goods, offering good penetration and uniform shade.
• Paper Staining: Employed for tinting specialty papers and paper products where color consistency is required.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings (subject to specific grade purity).

Basic Information

Product Name	Acid Orange 166
CAS No.	141489-66-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Orange 166; C.I. Acid Orange 166; 2-Naphthalenesulfonic acid, 7-[[4-[[(2,4-dimethylphenyl)amino]carbonyl]phenyl]azo]-8-hydroxy-, monosodium salt; Sodium 7-[[4-[[(2,4-dimethylphenyl)carbamoyl]phenyl]azo]-8-hydroxynaphthalene-2-sulfonate; Acid Leather Orange RL; Nylosan Orange E-RL; Telon Orange RL
EINECS	Contact for details

Quality Control

Our Acid Orange 166 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for color strength, shade, and purity. A Certificate of Analysis (COA) detailing parameters such as assay, solubility, and impurity profile is provided with each shipment to guarantee consistency and performance for your application.

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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture which may affect performance.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Shade & Strength	Within agreed tolerance vs. standard

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