Description

Reactive Yellow 145 is a high-performance, water-soluble reactive dye belonging to the azo class, designed for covalent bonding with cellulosic fibers. Its primary value lies in providing excellent wash and light fastness, brilliant yellow shades, and high fixation efficiency, which translates to reduced effluent load and cost savings. This dye is essential for textile manufacturers and dye houses specializing in the coloration of cotton, viscose, and other natural fibers, as well as for applications in the paper and leather industries where durable color is required.

Application

• Exhaust Dyeing of Cotton: For batch dyeing processes of yarn, knitwear, and woven fabrics, offering level dyeing and good reproducibility.
• Continuous Dyeing (Pad-Batch/Pad-Steam): Ideal for high-volume production of cellulosic fabrics, ensuring uniform penetration and high color yield.
• Viscose and Lyocell Dyeing: Provides bright and clear shades on regenerated cellulose fibers with excellent fastness properties.
• Paper Coloration: Used for tinting and dyeing specialty papers where water-fastness is important.
• Leather Finishing: Applied for dyeing leather goods, providing vibrant and durable color.
• Textile Printing: Suitable for printing pastes on cellulosic substrates, delivering sharp prints with good fastness.

Basic Information

Product Name	Reactive Yellow 145
CAS No.	93050-80-7
Molecular Formula	C29H19ClN9Na3O15S4
Molecular Weight	1027.23 g/mol
Synonyms	Reactive Yellow 145; C.I. Reactive Yellow 145; Reactive Brilliant Yellow M-3G; Reactive Golden Yellow M-3R; Reactive Yellow M-3R; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, trisodium salt; Triazinyl yellow dye; Vinyl sulfone reactive dye
EINECS	Contact for details

Quality Control

Every batch of Reactive Yellow 145 is manufactured and tested under a strict quality management system to ensure consistent shade, strength, and application performance. Our quality control includes verification of key parameters such as dye content, solubility, shade, and fastness properties against established industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance data is provided with each shipment to guarantee product integrity and 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 ambient temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Dye Content	Min. 70%
Moisture Content	Max. 5.0%
Water Solubility (at 50°C)	Min. 100 g/L
pH (1% Solution)	5.5 - 7.5
Shade	Conforms to standard
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.