Description

C.I. Reactive Yellow 163 is a high-performance, water-soluble reactive dye belonging to the azo chemical class. It is engineered to deliver brilliant and durable yellow shades with excellent fastness properties on cellulosic fibers. This product is essential for textile manufacturers and dye houses seeking reliable, consistent coloration for cotton, viscose, and other natural fabrics. Its primary value lies in providing strong color yield and good wash-fastness, ensuring the quality and longevity of the finished textile products.

Application

This reactive dye is specifically formulated for the coloration of cellulosic materials, offering versatility across several textile processing methods.

• Exhaust Dyeing of Cotton: For batch dyeing processes of yarns, knits, and woven fabrics.
• Continuous Dyeing: Suitable for pad-batch and pad-steam applications on cotton and viscose fabrics.
• Textile Printing: Used in the preparation of printing pastes for direct and discharge styles on cellulosic substrates.
• Union Dyeing: Effective for dyeing blends of cotton with synthetic fibers under specific conditions.
• Garment Dyeing: Applied for after-treatment coloration of finished cotton apparel items.

Basic Information

Product Name	C.I. Reactive Yellow 163
CAS No.	89797-02-4
Molecular Formula	C29H19ClN7Na4O19S6
Molecular Weight	1131.31 g/mol
Synonyms	Reactive Yellow 163; Reactive Yellow M-5R; Reactive Yellow H-E4R; C.I. 13245; Reactive Golden Yellow H-E4R; Novacron Yellow H-E4R; Remazol Golden Yellow RNL; Levafix Golden Yellow E-4RA; Drimarene Golden Yellow R/K-2R
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Yellow 163 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 properties. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and production planning.

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. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellow to orange powder
Color Strength	100 ± 3% (vs. Standard)
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%
Dusting Property	Low

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