Description

C.I. Reactive Yellow 52 is a high-performance, reactive dye belonging to the vinyl sulfone class, known for its bright yellow hue and excellent fastness properties. It is a critical component for achieving durable and vibrant coloration on cellulosic fibers like cotton and viscose through a covalent bond formation. This product is essential for textile manufacturers, dye houses, and industrial chemical suppliers serving the global apparel, home furnishing, and technical textiles markets.

Application

• Exhaust Dyeing of Cotton: Primary application for dyeing yarns, knits, and woven fabrics in jet, overflow, and beam dyeing machines.
• Continuous Dyeing Processes: Used in pad-batch and pad-steam ranges for efficient, large-scale coloration of cellulosic fabrics.
• Viscose and Linen Dyeing: Effective for dyeing other cellulosic fibers, providing good levelness and reproducibility.
• Shade Formulation: A key component in trichromatic dyeing systems to produce a wide spectrum of green, olive, and brown shades.
• Industrial Textiles: Suitable for dyeing technical textiles where wash and light fastness are critical requirements.
• Union Dyeing: Can be applied in combination with other dye classes for dyeing cellulosic components in fiber blends.

Basic Information

Product Name	C.I. Reactive Yellow 52
CAS No.	61969-34-4
Molecular Formula	C29H19ClN7Na3O13S4
Molecular Weight	956.23 g/mol
Synonyms	Reactive Yellow 52; Reactive Yellow M-4G; Reactive Yellow KE-4G; Reactive Yellow VS-4G; C.I. 18240; Vinylsulfone Reactive Yellow 52; Sodium 4-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-5-hydroxy-3-[[4-[[2-(sulfonatooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylamino)naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Yellow 52 adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and reactive group content. Certificates of Analysis (COA) detailing purity, physical properties, and application fastness results are provided with each shipment to support your quality assurance protocols.

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; ensure containers are sealed after use to prevent moisture absorption, which can affect solubility and performance.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Shade	Within agreed tolerance
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	6.0 - 8.0
Dusting Property	Low
Fastness Properties (on Cotton)	Wash: 4-5; Light: 5-6; Rubbing: 4-5

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