Description

C.I. Reactive Orange 83 is a high-performance, water-soluble reactive dye belonging to the azo chemical class, identified by CAS No. 76199-51-4. It is engineered to form a covalent bond with cellulosic fibers, delivering excellent wash and light fastness properties crucial for durable coloration. This dye is essential for textile manufacturers and dye houses specializing in cotton, viscose, and other cellulose-based materials, providing vibrant and consistent orange hues for a wide range of apparel and home furnishing applications.

Application

• Primary dyeing and printing of cotton fabrics for apparel.
• Coloration of viscose (rayon) and other regenerated cellulose fibers.
• Exhaust and continuous dyeing processes for home textiles like bed linens and towels.
• Used in the production of knitwear and denim requiring high colorfastness.
• Batch-wise dyeing in jet, overflow, and beam dyeing machines.
• Potential application in the dyeing of cellulosic blends with appropriate dyeing auxiliaries.

Basic Information

Product Name	C.I. Reactive Orange 83
CAS No.	76199-51-4
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1184.36 g/mol
Synonyms	Reactive Orange 83; Reactive Orange H-ER; Reactive Orange HE-R; C.I. 18282; Reactive Brilliant Orange H-ER; Triazinyl reactive dye Orange 83; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[3-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Orange 83 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fixation properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application test results is provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from incompatible materials and sources of ignition. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent caking or degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Color Strength	100 ± 3% (vs. Standard)
Solubility in Water	≥ 100 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Moisture Content	≤ 5.0%
Dusting Property	Low dusting
Fixation Rate (on Cotton)	≥ 70%
Identification (IR)	Conforms to standard

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