Description

C.I. Reactive Yellow 133 is a high-performance, water-soluble reactive dye belonging to the vinyl sulfone series, widely recognized for its bright and vibrant yellow hue. It is engineered to deliver excellent color yield and superior fastness properties, including wash, light, and perspiration fastness, on cellulosic fibers. This dye is a critical component for textile manufacturers and dye houses seeking reliable and consistent coloration for cotton, viscose, and other natural fibers. Its formulation ensures strong covalent bonding with the fiber substrate, resulting in durable and brilliant shades essential for high-quality apparel and home textiles.

Application

This reactive dye is primarily utilized in the textile industry for exhaust and continuous dyeing processes. Its key applications include:

• Exhaust Dyeing of Cotton and Viscose: For producing vibrant yellow shades with excellent reproducibility in jet, overflow, and beam dyeing machines.
• Continuous Dyeing (Pad-Batch/Steam): Suitable for pad-batch, pad-steam, and pad-dry thermofix processes on woven and knitted fabrics.
• Garment Dyeing: Ideal for dyeing finished cotton garments, providing uniform penetration and level dyeing.
• Yarn Dyeing: Used for dyeing cotton and viscose yarns in package and hank dyeing applications.
• Union Dyeing: Effective in dyeing blends of cotton with other fibers where a uniform yellow color is required on the cellulosic component.
• Printing: Can be used in reactive printing pastes for producing sharp and bright prints on cellulose-based textiles.

Basic Information

Product Name	C.I. Reactive Yellow 133
CAS No.	89591-47-9
Molecular Formula	C29H19ClN7Na4O19S6
Molecular Weight	1135.28 g/mol
Synonyms	Reactive Yellow 133; Reactive Brilliant Yellow SP-3R; C.I. 19138; Reactive Yellow SP-3R; Reactive Yellow M-3R; Vinylsulfone Reactive Yellow 133; Remazol Brilliant Yellow 3R; Levafix Brilliant Yellow E-3R; Procion Yellow SP-3R; Drimarene Brilliant Yellow K-3R
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Yellow 133 adheres to stringent quality management systems to ensure batch-to-batch consistency and performance reliability. Every lot undergoes comprehensive testing against established specifications for strength, shade, solubility, and fastness properties. Certificates of Analysis (COA) documenting key parameters such as dye content, purity, and impurity profile are available upon request. Our quality commitment aligns with industry best practices to support your manufacturing excellence.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (Standard)
Shade	Conforms to standard
Solubility in Water (50°C)	≥ 100 g/L
Moisture Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Fastness to Washing	≥ 4 (ISO 105-C03)
Fastness to Light	≥ 5 (ISO 105-B02)

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