Description

C.I. Reactive Yellow 85 is a high-performance, water-soluble reactive dye belonging to the azo chemical class, primarily used for coloring cellulosic fibers. Its key value lies in its excellent fastness properties, including good wash and light fastness, and its ability to form a covalent bond with the fiber substrate, ensuring vibrant and durable coloration. This product is essential for textile manufacturers, particularly in the dyeing and printing of cotton, viscose, and other natural fibers, where consistent shade and high-quality results are required.

Application

• Exhaust dyeing of cotton yarn and fabrics.
• Continuous pad-batch and pad-steam dyeing processes for cellulosic textiles.
• Textile printing applications on cotton and viscose.
• Dyeing of regenerated cellulose fibers like lyocell and modal.
• Used in combination with other reactive dyes to achieve a wide spectrum of yellow and green shades.
• Suitable for use in industrial dye houses requiring dyes with good solubility and reproducibility.

Basic Information

Product Name	C.I. Reactive Yellow 85
CAS No.	71872-81-6
Molecular Formula	C29H19ClN7Na4O19S6
Molecular Weight	1180.33 g/mol
Synonyms	Reactive Yellow 85; Reactive Yellow M-5R; Reactive Yellow KE-4R; Reactive Yellow H-E4R; C.I. 18222; Reactive Brilliant Yellow KE-4R; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[3-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-methoxy-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Yellow 85 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fixation rate to meet the demanding standards of the global textile industry. Certificates of Analysis (COA) detailing purity, physical properties, and application performance are available upon request.

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 incompatible materials and sources of ignition. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (Standard)
Shade	Conforms to standard
Solubility in Water	≥ 100 g/L (at 50°C)
Moisture Content	≤ 5.0%
pH (1% Solution)	5.5 - 7.5
Fixation Rate	≥ 70%

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