Description

Reactive Red 83 is a high-purity, reactive dye belonging to the azo dye class, identified by CAS NO 61969-26-4. It is engineered for exceptional color fastness and covalent bonding with cellulosic fibers, ensuring vibrant and durable coloration. This product is essential for manufacturers in the textile industry seeking reliable and efficient dyeing solutions for cotton, viscose, and other natural fibers.

Application

• Textile Dyeing: Primary application for the exhaust and continuous dyeing of cotton, viscose, and other cellulosic fibers.
• Printing: Used in textile printing pastes for creating sharp, wash-fast prints on natural fabrics.
• Leather Coloring: Imparts durable red shades to leather goods in tanneries.
• Paper Staining: Employed for coloring specialty papers where high color strength is required.
• Research & Development: Serves as a standard or intermediate in chemical research and dye synthesis laboratories.
• Industrial Colorant: Potential use in the coloration of non-textile substrates where reactive properties are beneficial.

Basic Information

Product Name	Reactive Red 83
CAS No.	61969-26-4
Molecular Formula	C31H19ClN7Na5O19S6
Molecular Weight	1244.16 g/mol
Synonyms	Reactive Red 83; C.I. Reactive Red 83; Reactive Brilliant Red M-8B; Reactive Red M-8B; Remazol Brilliant Red 5B; Levafix Brilliant Red E-4BA; Procion Red H-8B; C.I. 18221; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-4-sulfophenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, sodium salt (1:5)
EINECS	Contact for details

Quality Control

Our Reactive Red 83 is produced under strict quality management systems to ensure batch-to-batch consistency and high performance. Each lot undergoes rigorous testing, including spectrophotometric analysis for color strength and purity, to meet industry standards for reactive dyes. A comprehensive Certificate of Analysis (COA) detailing assay, shade, solubility, and other critical parameters is provided with every shipment.

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

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	≥ 98% (vs. Standard)
Assay (HPLC)	≥ 85%
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (at 50°C)
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.