Description

Reactive Blue 73 is a high-purity, reactive anthraquinone dye used for coloring cellulosic fibers. This product is valued for its excellent wash and light fastness properties, providing vibrant and durable blue shades. It is essential for textile manufacturers, particularly in the production of cotton, viscose, and other cellulose-based fabrics, where consistent color yield and process reliability are critical.

Application

• Primary dyeing of cotton yarns and fabrics.
• Exhaust dyeing of cellulosic fibers like viscose and linen.
• Continuous dyeing and pad-batch processes in textile mills.
• Printing applications on cellulose-based textiles.
• Used in formulations for specialty inks requiring reactive dyes.
• Research and development of new dye formulations and color matching.

Basic Information

Product Name	Reactive Blue 73
CAS No.	61968-94-3
Molecular Formula	C29H19ClN7O11S3
Molecular Weight	781.10 g/mol
Synonyms	Reactive Blue 73; C.I. Reactive Blue 73; Remazol Brilliant Blue R; Levafix Brilliant Blue E-RA; Procion Blue H-ERD; Drimarene Brilliant Blue K-2RL; Sumifix Brilliant Blue R; Anthraquinone Blue Dye
EINECS	Contact for details

Quality Control

Our Reactive Blue 73 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot is tested for critical parameters including color strength, solubility, and reactive group content. A Certificate of Analysis (COA) detailing purity, shade, and application performance is provided with every shipment to guarantee it meets your specific dyeing 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 moisture to maintain product integrity and shelf life.

Specification

Item	Specification
Appearance	Dark Blue Powder
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (at 50°C)
pH (1% Solution)	5.5 - 7.5
Identification (IR)	Conforms
Heavy Metals (as Pb)	≤ 50 ppm

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