Description

C.I. Reactive Red 43 is a high-performance, water-soluble azo-based reactive dye designed for covalent bonding with cellulosic fibers. This compound matters for its excellent wash and light fastness properties, providing vibrant and durable red colorations in demanding textile applications. It is primarily needed by manufacturers in the textile industry for dyeing and printing cotton, viscose, and other natural fibers, as well as for research and development in specialty colorant formulations.

Application

• Exhaust dyeing of cotton yarn and knitted fabrics.
• Continuous pad-batch and pad-steam dyeing of woven cellulosic textiles.
• Textile printing applications for creating sharp, defined red patterns.
• Coloration of viscose rayon and other regenerated cellulose materials.
• Used in laboratory settings for dye research and development of new shades.
• Potential application in the coloration of leather and paper where reactive dyes are specified.

Basic Information

Product Name	C.I. Reactive Red 43
CAS No.	12226-20-9
Molecular Formula	C31H19ClN7Na5O19S6
Molecular Weight	1240.37 g/mol
Synonyms	Reactive Red 43; Reactive Brilliant Red X-3B; Reactive Brilliant Red X-3B (C.I.); Remazol Brilliant Red X-3B; Levafix Brilliant Red E-4BA; Procion Red H-3B; C.I. 18260; Sodium 8-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-1-hydroxy-3,6-disulfo-2-[[4-[(4-sulfophenyl)azo]phenyl]azo]naphthalene-4-sulfonate
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Red 43 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. Certificates of Analysis (COA) detailing purity, physical properties, and application test results are available upon request 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 room temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to structure
Color Strength	≥ 98% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70% (on cotton)
Dusting Property	Low dusting

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