Description

Reactive Orange 45 is a high-performance, water-soluble azo dye belonging to the reactive dye class, designed for covalent bonding with cellulosic fibers. Its primary value lies in providing brilliant orange hues with excellent wash, light, and perspiration fastness properties on textiles. This product is essential for manufacturers in the textile dyeing and printing industries, particularly for cotton, viscose, and other natural fiber applications where durable coloration is critical.

Application

• Exhaust Dyeing of Cotton: For batch dyeing processes of yarns, knits, and woven fabrics, offering high fixation and reproducibility.
• Continuous Dyeing: Applied in pad-batch and pad-steam processes for efficient, large-scale coloration of cellulosic textiles.
• Textile Printing: Used in pigment printing formulations to create sharp, vibrant orange patterns on fabric.
• Viscose and Linen Dyeing: Effective for dyeing other natural and regenerated cellulosic materials beyond cotton.
• Leather Coloring: Employed in the finishing of leather goods to achieve specific orange shades.
• Paper Dyeing: Suitable for coloring paper pulp to produce specialty colored papers.

Basic Information

Product Name	Reactive Orange 45
CAS No.	12769-03-8
Molecular Formula	C26H17ClN7Na3O11S3
Molecular Weight	837.07 g/mol
Synonyms	Reactive Orange 45; C.I. Reactive Orange 45; Reactive Brilliant Orange K-7G; Reactive Orange K-7G; Reactive Orange KE-3R; Lanasol Orange 3R; Remazol Orange 3R; Triazine Reactive Orange Dye
EINECS	Contact for details

Quality Control

Our Reactive Orange 45 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent strength, shade, and reactive group content, meeting the high standards required for industrial textile applications. A Certificate of Analysis (COA) detailing purity, solubility, and colorimetric data is provided with each shipment to guarantee supply reliability and performance consistency 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 strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure the original packaging is sealed after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Orange to Reddish-Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	Min. 95%
Strength (Color Value)	100 ± 3%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Fixation Rate	Min. 70%

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