Description

C.I. Reactive Yellow 59 is a high-performance, water-soluble reactive dye designed for covalent bonding with cellulosic fibers. This compound matters for its excellent color fastness properties, including superior wash and light fastness, which are critical for durable textile coloration. Industries that need it include textile manufacturers specializing in cotton, viscose, and other natural fibers, as well as producers of dyed paper and leather. Its reliable performance makes it a key component for achieving vibrant and stable yellow shades in demanding applications.

Application

• Exhaust dyeing of cotton and other cellulosic fibers in textile mills.
• Continuous pad-batch and pad-steam dyeing processes for fabrics.
• Printing applications on cellulosic textiles to create sharp, defined patterns.
• Dyeing of viscose rayon and linen for apparel and home furnishings.
• Coloration of paper pulp for specialty colored papers.
• Leather dyeing for consistent and fast coloration.
• Used in combination with other reactive dyes to produce a wide range of green and brown shades.
• Potential application in research and development for novel biomaterial staining.

Basic Information

Product Name	C.I. Reactive Yellow 59
CAS No.	61969-37-7
Molecular Formula	C25H20ClN7Na4O16S4
Molecular Weight	1025.18 g/mol
Synonyms	Reactive Yellow M-5R; Reactive Yellow KE-4R; Reactive Yellow KE-4RN; C.I. 18696; Reactive Brilliant Yellow KE-4N; Reactive Yellow H-E4R; 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; Tetrasodium 5-({4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl}amino)-4-hydroxy-3-({4-[2-(sulfonatooxy)ethylsulfonyl]phenyl}diazenyl)naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Yellow 59 adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including dye content, shade, solubility, and fixation rate. We provide comprehensive Certificates of Analysis (COA) that detail these specifications, supporting your own quality assurance and compliance needs for global textile manufacturing standards.

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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms
Dye Content	≥ 80%
Shade	Standard
Solubility in Water	≥ 100 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Moisture Content	≤ 5.0%
Fixation Rate	≥ 70%

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