Description

Reactive Orange 91 is a high-performance, fiber-reactive dye belonging to the azo dye class, designed for covalent bonding with cellulosic fibers. Its primary value lies in delivering brilliant and durable orange shades with excellent wash and light fastness properties. This product is essential for textile manufacturers and dye houses specializing in the coloration of cotton, viscose, and other cellulose-based materials, ensuring vibrant and long-lasting results.

Application

• Primary application in the exhaust dyeing of cotton yarns and fabrics.
• Used in the continuous dyeing and pad-batch processes for cellulosic textiles.
• Suitable for dyeing viscose (rayon) and linen to achieve bright orange hues.
• Employed in the production of home textiles such as bed linens, curtains, and upholstery fabrics.
• Used for dyeing garments and fashion apparel requiring high colorfastness.
• Applicable in the tie-dye and craft dyeing sectors for cellulose materials.

Basic Information

Product Name	Reactive Orange 91
CAS No.	91254-18-1
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1185.31 g/mol
Synonyms	Reactive Orange H-ER; C.I. Reactive Orange 91; Reactive Brilliant Orange H-ER; Novacron Orange H-ER; Remazol Brilliant Orange H-ER; Drimarene Orange K-2R; Levafix Orange E-3GA; Triazine Reactive Dye Orange 91
EINECS	Contact for details

Quality Control

Our Reactive Orange 91 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent shade, reactivity, and fastness properties. We provide comprehensive Certificates of Analysis (COA) that include key parameters such as color strength, solubility, and fixation rate, ensuring it meets the specifications required for industrial textile applications.

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. Due to its light-sensitive nature, the container should be opaque or stored in a dark place.

Specification

Item	Specification
Appearance	Orange to Reddish-Orange Powder
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility	≥ 100 g/L (at 50°C)
pH (1% Solution)	5.5 - 7.5
Dusting Grade	Low Dusting
Fixation Rate	≥ 70% (Standard Conditions)
Identification (IR)	Conforms to Standard

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