Description

Reactive Yellow 185 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 color fastness properties, particularly to washing and light, ensuring vibrant and durable coloration in demanding applications. This product is essential for textile manufacturers and dye houses specializing in cotton, viscose, and other natural fiber dyeing, where consistent shade and reliable performance are critical for quality assurance.

Application

• Exhaust dyeing of cotton yarns and fabrics.
• Continuous pad-batch and pad-steam dyeing processes for cellulosic textiles.
• Printing applications on cotton and viscose substrates.
• Dyeing of viscose rayon and linen fibers.
• Used in formulations for creating a wide range of yellow to orange shades.
• Ideal for applications requiring high wet fastness and good lightfastness.

Basic Information

Product Name	Reactive Yellow 185
CAS No.	111211-44-0
Molecular Formula	C31H23ClN9Na3O13S3
Molecular Weight	984.22 g/mol
Synonyms	Reactive Yellow 185; C.I. Reactive Yellow 185; Reactive Golden Yellow SP-3R; Reactive Yellow SP-3R; Reactive Yellow M-3R; Triazinyl reactive dye Yellow 185; 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-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, trisodium salt
EINECS	Contact for details

Quality Control

Our Reactive Yellow 185 is manufactured under a strict quality management system. Every batch undergoes comprehensive testing for critical parameters including shade, strength, solubility, and fixation properties to ensure consistency and performance. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with our rigorous internal specifications.

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 hygroscopic (moisture-sensitive).

Specification

Item	Specification
Appearance	Yellow to orange powder
Color Strength	Standard Depth ± 3%
Solubility in Water	≥ 100 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Moisture Content	≤ 5.0%
Dusting Property	Low
Fixation Rate	≥ 70% (Standard conditions)

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