Description

C.I. Reactive Yellow 64 is a high-performance, water-soluble reactive dye belonging to the vinyl sulfone class, known for its bright and vivid yellow hue. It is engineered to deliver excellent color yield and superior wash and light fastness properties on cellulosic fibers like cotton and viscose. This product is essential for textile manufacturers and dye houses seeking reliable, consistent coloration for apparel, home textiles, and industrial fabrics. Its reactive nature ensures strong covalent bonds with the fiber, resulting in brilliant, durable shades.

Application

• Exhaust dyeing and continuous dyeing of cotton and viscose fibers.
• Printing applications on cellulosic textiles for fashion and home furnishings.
• Used in combination with other reactive dyes to produce a wide range of green and brown shades.
• Ideal for dyeing knitted fabrics and yarns requiring high wet fastness.
• Suitable for industrial textile applications where color consistency and durability are critical.
• Employed in the coloration of towels, bed linens, and other home textile products.

Basic Information

Product Name	C.I. Reactive Yellow 64
CAS No.	61969-38-8
Molecular Formula	C29H19ClN7Na4O19S6
Molecular Weight	1131.28 g/mol
Synonyms	Reactive Yellow 3RS; Reactive Yellow R-4GL; C.I. 12237; Reactive Golden Yellow R-4GL; Vinylsulfone Reactive Dye Yellow 64; 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

Every batch of C.I. Reactive Yellow 64 is manufactured and tested under a strict quality management system. We ensure compliance with industry standards for reactive dyes, including parameters for shade, strength, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee batch-to-batch consistency and reliability for your production 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). This product is hygroscopic (moisture-sensitive); therefore, the original container must be kept tightly sealed after use to prevent caking or degradation due to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to Orange 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%
Dye Content	≥ 70%
Identification (IR)	Conforms to Standard
Fastness Properties (Typical)	Light: 5-6; Wash: 4-5; Rubbing: 4-5

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