Description

Reactive Blue 104 is a high-purity, reactive anthraquinone dye specifically engineered for demanding textile coloration processes. Its primary value lies in its excellent wash and light fastness properties, providing vibrant and durable blue shades on cellulosic fibers like cotton and viscose. This product is essential for textile manufacturers, dye houses, and chemical distributors serving the global market who require consistent quality and reliable performance in batch dyeing and printing applications. Reactive Blue 104 CAS NO 61951-74-4 is a key component for achieving a wide range of blue hues in the production of apparel, home textiles, and industrial fabrics.

Application

• Exhaust Dyeing of Cotton: Primary application for dyeing yarns, knits, and woven fabrics in jet, overflow, and beam dyeing machines.
• Continuous Dyeing of Cellulosics: Used in pad-batch and pad-steam processes for efficient, large-scale fabric production.
• Textile Printing: Formulated for use in reactive dye printing pastes on cotton and viscose substrates.
• Union Dyeing: Effective for dyeing blends of cotton with polyester or nylon when used in appropriate combination dyeing processes.
• Leather Coloration: Applied for dyeing leather where reactive properties are beneficial for certain finishes.
• Paper Dyeing: Suitable for specialty paper grades requiring colorfastness.
• Biomolecule Staining: Potential use in laboratory settings for staining biological materials, given its reactive nature.
• Educational & Research: Used in academic and industrial R&D for dye chemistry studies and new application development.

Basic Information

Product Name	Reactive Blue 104
CAS No.	61951-74-4
Molecular Formula	C29H19ClN7O11S3·xNa
Molecular Weight	Approx. 840.2 (Free Acid)
Synonyms	Reactive Blue 104; C.I. Reactive Blue 104; Remazol Brilliant Blue R Special; Levafix Brilliant Blue E-BRA; Drimarene Brilliant Blue K-2RL; Procion Blue H-ERD; Kayacion Blue E-SE; Cibacron Blue F-R; Sumifix Brilliant Blue BR; Vinylsulfone Reactive Dye
EINECS	Contact for details

Quality Control

Our Reactive Blue 104 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent color strength, solubility, fixation rate, and fastness properties. Key parameters such as hue, shade, and impurity profile are monitored against established internal specifications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee it meets the demands of industrial textile processing.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent caking and hydrolysis. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Blue Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.0 - 7.0
Dusting Property	Low
Fixation Rate (on Cotton)	≥ 70%
Fastness to Washing	≥ 4 (ISO 105-C03)
Fastness to Light	≥ 5-6 (ISO 105-B02)

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