Description

C.I. Reactive Yellow 7 is a high-purity, water-soluble reactive dye belonging to the vinyl sulfone class, known for its bright yellow hue and excellent fastness properties. Its primary value lies in forming a strong covalent bond with cellulose fibers, ensuring vibrant, wash-fast, and lightfast coloration in textile applications. This product is essential for manufacturers in the textile dyeing and printing industries, particularly for cotton, viscose, and other cellulosic materials, where consistent color yield and process reliability are critical.

Application

• Exhaust dyeing and continuous dyeing of cellulosic fibers such as cotton, linen, and rayon.
• Textile printing applications for creating sharp, durable patterns on fabrics.
• Used in the coloration of paper and specialty cellulosic non-wovens.
• Employed in research and development for synthesizing new dye intermediates or studying reactive dye chemistry.
• Potential application in the dyeing of leather where reactive dyes are specified.

Basic Information

Product Name	C.I. Reactive Yellow 7
CAS No.	12226-46-9
Molecular Formula	C19H12ClN7Na2O10S3
Molecular Weight	715.00 g/mol
Synonyms	Reactive Yellow 7; Reactive Brilliant Yellow SP-8; C.I. 18972; Reactive Yellow SP-8; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfooxyethyl)sulfonyl]-, sodium salt (1:2); Vinylsulfone Reactive Yellow; Levafix Yellow E-3G
EINECS	Contact for details

Quality Control

Every batch of C.I. Reactive Yellow 7 is manufactured under a strict quality management system and undergoes comprehensive analytical testing. Key parameters such as color strength, shade, solubility, and reactive group content are verified to ensure batch-to-batch consistency and performance in your process. A detailed Certificate of Analysis (COA) confirming conformity to agreed specifications is provided with each shipment.

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 and incompatible materials. The product is hygroscopic (moisture-sensitive); ensure the container is resealed tightly after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Within agreed tolerance
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	6.0 - 8.0
Dye Content	≥ 70.0%

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