Description

Reactive Yellow 179 is a high-performance, water-soluble reactive dye designed for covalent bonding with cellulosic fibers. This compound is valued for its excellent color fastness properties, including superior wash and light fastness, ensuring vibrant and durable coloration. It is primarily used by textile manufacturers and dye houses for dyeing and printing cotton, viscose, and other natural fibers, as well as in applications requiring a bright, stable yellow hue.

Application

• Exhaust dyeing of cotton and cotton-blended fabrics and yarns.
• Continuous dyeing processes for cellulosic textiles.
• Textile printing on natural fiber substrates.
• Garment dyeing for consistent and level shades.
• Dyeing of viscose rayon and other regenerated cellulose fibers.
• Potential use in the coloration of leather and paper, depending on grade.

Basic Information

Product Name	Reactive Yellow 179
CAS No.	93376-16-0
Molecular Formula	C29H19ClN7Na4O19S6
Molecular Weight	1181.31 g/mol
Synonyms	Reactive Yellow M-5R; C.I. Reactive Yellow 179; Reactive Golden Yellow M-5R; Reactive Yellow H-5R; Yellow 179 Reactive Dye; 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]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our Reactive Yellow 179 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent strength, shade, and reactivity, meeting the high standards required for industrial textile applications. A detailed Certificate of Analysis (COA) confirming parameters such as purity, solubility, and fastness properties is provided with each shipment.

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 and moisture to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95%
Shade	Conforms to standard
Solubility in Water	≥ 100 g/L (at 50°C)
Moisture Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70%

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