Description

Reactive Orange 5 is a highly reactive azo dye belonging to the vinyl sulfone class, known for its bright orange hue and excellent fastness properties. Its primary value lies in forming a strong covalent bond with cellulose fibers, ensuring vibrant, wash-fast coloration critical for high-quality textile production. This dye is essential for manufacturers in the textile industry, particularly for dyeing and printing cotton, viscose, and other cellulosic fabrics where durability and color brilliance are paramount.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, rayon, and other cellulosic fibers.
• Textile Printing: Used in printing pastes for creating sharp, durable orange patterns on fabrics.
• Leather Coloring: Employed in the dyeing of leather goods to achieve consistent and fast orange shades.
• Paper Staining: Suitable for coloring paper products where a strong bond to cellulose is required.
• Research & Development: Serves as a key intermediate or reference standard in dye chemistry research and quality control laboratories.

Basic Information

Product Name	Reactive Orange 5
CAS No.	70210-21-8
Molecular Formula	C19H10Cl2N6Na2O7S2
Molecular Weight	615.34 g/mol
Synonyms	Reactive Orange 5; C.I. Reactive Orange 5; Reactive Brilliant Orange X-GN; Remazol Brilliant Orange 3R; Levafix Orange E-3GA; Procion Orange MX-2R; 2,7-Naphthalenedisulfonic acid, 4-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-5-hydroxy-6-(phenylamino)-, disodium salt; Vinyl sulfone reactive dye (Orange)
EINECS	Contact for details

Quality Control

Our Reactive Orange 5 is manufactured under a stringent quality management system. Every batch undergoes comprehensive testing, including spectrophotometric analysis for strength and shade, HPLC for purity and impurity profiling, and tests for solubility and reactivity. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to ensure consistent quality and performance for your production processes.

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); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Orange to reddish-orange powder
Identification (IR)	Conforms to standard
Color Strength	≥ 98% (vs. Standard)
Assay (HPLC)	≥ 90%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Shade on Cotton	Conforms to standard
Fastness Properties	Wash Fastness: ≥ 4; Light Fastness: ≥ 5

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