Description

Reactive Yellow 4 is a high-purity, water-soluble anionic dye belonging to the reactive azo dye class, identified by CAS NO 12226-45-8. This product is engineered for exceptional color fastness and brilliant yellow hue, providing reliable and consistent performance in demanding industrial dyeing processes. It is primarily utilized by manufacturers in the textile industry for coloring cellulosic fibers like cotton, viscose, and linen, ensuring vibrant and wash-resistant fabrics.

Application

Reactive Yellow 4 is a versatile dye with established applications across several industrial sectors. Its primary and related uses include:

• Textile Dyeing: Exhaust and continuous dyeing of cotton, viscose, linen, and other cellulosic fibers.
• Garment Processing: Used in batch dyeing processes for finished apparel and knitwear.
• Yarn Dyeing: Application for dyeing cellulosic yarns in hank or package form.
• Technical Textiles: Coloring of non-apparel textiles where color consistency is critical.
• Research & Development: Serves as a reference standard or intermediate in chemical synthesis and dye research.

Basic Information

Product Name	Reactive Yellow 4
CAS No.	12226-45-8
Molecular Formula	C26H18ClN9Na3O11S3
Molecular Weight	872.10 g/mol
Synonyms	Reactive Yellow 4; Reactive Brilliant Yellow X-4G; C.I. Reactive Yellow 4; Reactive Yellow X-4G; Brilliant Reactive Yellow X-4G; Levafix Brilliant Yellow E-4G; Procion Brilliant Yellow H-4G; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(4-methoxyphenyl)azo]-, trisodium salt
EINECS	Contact for details

Quality Control

Our production of Reactive Yellow 4 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot undergoes comprehensive analytical testing, including spectrophotometric analysis for strength and shade, and HPLC for purity profiling. Certificates of Analysis (COA) documenting key parameters such as dye content, solubility, and fastness properties 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; ensure containers are sealed after use to prevent moisture absorption, which may affect performance.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Dye Content	≥ 80%
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	6.0 - 8.0
Fastness Properties (Cotton)	Wash: 4-5, Light: 5-6

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