Description

C.I. Reactive Orange 40 is a high-performance, water-soluble reactive dye belonging to the azo dye class. This compound is essential for achieving vibrant and wash-fast orange to red-orange shades on cellulosic fibers like cotton and viscose. It is a critical raw material for textile manufacturers, dye houses, and chemical suppliers serving the global apparel and home furnishing industries. The product is supplied as a high-purity powder to ensure consistent batch-to-batch performance in demanding dyeing processes.

Application

This reactive dye is engineered for excellence in textile coloration, offering superior fixation and fastness properties.

• Exhaust Dyeing of Cotton: Primary application for dyeing yarns, knits, and woven fabrics in jet, overflow, and beam dyeing machines.
• Continuous Dyeing Processes: Used in pad-batch and pad-steam ranges for efficient, large-scale fabric production.
• Viscose and Rayon Coloration: Provides excellent build-up and color yield on regenerated cellulosic fibers.
• Union Dyeing: Effective for dyeing blends of cotton with other fibers where a uniform shade is required.
• Garment Dyeing: Suitable for producing fashionable, piece-dyed apparel with high wash fastness.
• Home Textiles: Used for dyeing towels, bed linens, and upholstery fabrics that require durability to repeated washing.

Basic Information

Product Name	C.I. Reactive Orange 40
CAS No.	61969-10-6
Molecular Formula	C26H17ClN7Na4O16S4
Molecular Weight	984.15 g/mol
Synonyms	Reactive Orange 40; Reactive Brilliant Orange 3R; C.I. 18280; Reactive Orange H-ER; Triazinyl reactive orange dye; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfophenyl)azo]-, tetrasodium salt; Levafix Orange E-3R; Procion Orange H-ER
EINECS	Contact for details

Quality Control

Our C.I. Reactive Orange 40 is manufactured under a strict quality management system. Every batch is analyzed to ensure it meets precise specifications for shade, strength, solubility, and fixation properties. We provide comprehensive Certificates of Analysis (COA) that detail purity, inorganic salt content, and fastness test results, ensuring reliability 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). Keep away from heat, sparks, and open flame. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Orange to Red-Orange Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 0.2%
pH (1% Solution)	5.5 - 7.5
Shade	Conforms to Standard
Fastness Properties (Typical)	Wash: 4-5, Light: 5-6, Rubbing: 4-5

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