Description

Reactive Red 40 is a synthetic, water-soluble azo dye belonging to the reactive dye class, primarily used for coloring cellulosic fibers. Its key value lies in forming a covalent bond with the fiber substrate, resulting in excellent wash and light fastness properties. This product is essential for industrial-scale textile dyeing and printing operations, particularly for cotton, viscose, and other natural fibers. It is also utilized in the coloration of leather and paper, where vibrant and durable red shades are required.

Application

• Primary application in the exhaust dyeing of cotton and viscose yarns and fabrics.
• Used in continuous dyeing and printing processes for textiles.
• Suitable for the coloration of leather to achieve uniform red hues.
• Employed in the paper industry for surface coloring and coating applications.
• Can be applied in batchwise dyeing of cellulosic blends.

Basic Information

Product Name	Reactive Red 40
CAS No.	12226-17-4
Molecular Formula	C26H21ClN7Na4O19S6
Molecular Weight	Contact for details
Synonyms	Reactive Red HE 3B; C.I. Reactive Red 40; Reactive Red HE-3B; Remazol Red HE-3B; Levafix Red E-3B; Procion Red HE-3B; Reactive Red M-3B; 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-[[2-methoxy-5-[(methylamino)sulfonyl]phenyl]azo]-, sodium salt (1:4)
EINECS	Contact for details

Quality Control

Our Reactive Red 40 is manufactured under a stringent quality management system. Every batch undergoes comprehensive testing for critical parameters including color strength, shade, solubility, and fixation properties to ensure consistent performance in your dyeing processes. A Certificate of Analysis (COA) detailing purity, physical properties, and application test results is provided with each shipment to guarantee compliance with your specifications.

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 and moisture to maintain product stability and shelf life.

Specification

Item	Specification
Appearance	Red Powder
Color Strength	Standard Depth ± 3%
Solubility in Water	≥ 100 g/L (at 50°C)
Moisture Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70%
Identification (IR)	Conforms
Heavy Metals (as Pb)	≤ 50 ppm

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