Description

Reactive Violet 7 is a synthetic anthraquinone-based dye belonging to the fiber-reactive dye class, widely used for its excellent colorfastness properties. Its primary value lies in forming a covalent bond with cellulosic fibers, resulting in vibrant, wash-fast violet to blue shades that are highly resistant to fading. This product is essential for textile manufacturers and dye houses specializing in cotton, viscose, linen, and other natural fiber dyeing and printing processes. Its application ensures consistent, high-quality coloration for a range of fabrics from apparel to home textiles.

Application

• Exhaust Dyeing of Cellulosic Fibers: Used in batch dyeing processes for cotton, rayon, linen, and hemp to achieve deep, level shades.
• Continuous Dyeing: Applied in pad-batch, pad-steam, and pad-dry thermofix processes for efficient, large-scale fabric production.
• Textile Printing: A key component in printing pastes for direct and discharge printing on natural fabrics.
• Garment Dyeing: Suitable for dyeing finished knitted or woven garments to meet specific color demands.
• Industrial Fabric Coloring: Used for dyeing canvas, webbing, and other technical textiles.
• Research & Development: Serves as a standard or intermediate in chemical and textile research laboratories.

Basic Information

Product Name	Reactive Violet 7
CAS No.	12226-39-0
Molecular Formula	C20H16N3Na3O11S3
Molecular Weight	681.51 g/mol
Synonyms	Reactive Violet H3R; C.I. Reactive Violet 7; Remazol Violet 5R; Levafix Violet P-3R; Procion Violet H-3R; Anthraquinone violet reactive dye; 1-Amino-4-[3-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-sulfophenyl]amino-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid trisodium salt
EINECS	Contact for details

Quality Control

Our Reactive Violet 7 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fixation properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application test results is provided with each shipment to guarantee it meets your specific technical requirements.

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 excessive heat. Under these conditions, the product maintains optimal stability.

Specification

Item	Specification
Appearance	Dark Blue to Violet Powder
Color Strength	Standard Depth ± 3%
Moisture Content	≤ 5.0%
Water Solubility	≥ 100 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70% (Standard Cotton)
Identification (IR)	Conforms to Standard
Heavy Metals (as Pb)	≤ 50 ppm

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