Description

C.I. Reactive Yellow 1 is a high-purity, water-soluble anionic dye belonging to the reactive azo dye class, identified by CAS NO 12226-44-7. It is engineered for covalent bonding with cellulosic fibers, providing excellent wash and light fastness properties. This reactive dye is essential for manufacturers in the textile industry seeking vibrant, durable yellow coloration on cotton, viscose, and other natural fibers.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, linen, and regenerated cellulose fibers.
• Fabric Printing: Used in printing pastes for creating sharp, bright yellow patterns on cellulosic fabrics.
• Leather Coloring: Imparts a stable yellow color to leather goods in conjunction with appropriate mordants.
• Paper Staining: Employed for coloring paper pulp to achieve specific shades of yellow in specialty papers.
• Research & Development: Serves as a standard or reference compound in dye chemistry research and quality control laboratories.
• Educational Use: Utilized in academic settings for demonstrating reactive dyeing principles and techniques.

Basic Information

Product Name	C.I. Reactive Yellow 1
CAS No.	12226-44-7
Molecular Formula	C19H10Cl2N6Na2O7S2
Molecular Weight	627.34 g/mol
Synonyms	Reactive Yellow 1; Reactive Light Yellow K-4G; C.I. 18971; Reactive Yellow K-4G; 4,4'-(Diazoamino)-dibenzenesulfonic acid, 2,2'-(1-triazinyl)bis[6-[(4-chloro-6-((4-sulfophenyl)amino)-1,3,5-triazin-2-yl)amino]-; Procion Yellow H-4G; Levafix Yellow E-4G; Remazol Yellow RR
EINECS	Contact for details

Quality Control

Our C.I. Reactive Yellow 1 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including spectrophotometric purity assessment, strength evaluation, and shade consistency checks against industry standards. Certificates of Analysis (COA) detailing specific batch results are available upon request to ensure transparency and meet your quality assurance protocols.

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 the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Water Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Meets commercial requirements

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