Description

C.I. Reactive Blue 139 is a high-performance, vinyl sulfone-based reactive dye renowned for its brilliant blue hue and excellent fastness properties. This product is engineered for superior dye fixation and color yield on cellulosic fibers, making it a critical component for achieving consistent, high-quality coloration in demanding textile applications. It is an essential chemical for textile manufacturers, dyers, and print houses seeking reliable and vibrant blue shades with good wash and light fastness.

Application

C.I. Reactive Blue 139 is primarily utilized in the textile dyeing and printing industry. Its specific applications include:

• Exhaust dyeing of cotton, viscose, and other cellulosic fibers.
• Continuous dyeing processes such as pad-batch and pad-steam for fabrics.
• Textile printing for creating sharp, defined blue patterns on cellulosic materials.
• Garment dyeing for finished apparel items.
• Used in combination with other reactive dyes to produce a wide range of compound shades and blacks.

Basic Information

Product Name	C.I. Reactive Blue 139
CAS No.	77907-31-4
Molecular Formula	C23H14ClN7O11S3·2Na
Molecular Weight	781.06 g/mol (Disodium salt)
Synonyms	Reactive Blue 139; Reactive Blue KN-R; C.I. 61311; Remazol Brilliant Blue R; Levafix Brilliant Blue E-B; Drimarene Brilliant Blue R; Vinylsulfone Reactive Blue 139; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Blue 139 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fixation rate. Certificates of Analysis (COA) detailing purity, physical properties, and application performance are provided and available upon request to support your quality assurance processes.

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). This product is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Dark blue powder
Color Strength	100 ± 3% (Standard)
Shade	Conforms to standard
Solubility in Water	≥ 100 g/L (at 50°C)
Moisture Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70% (on cotton)
Fastness Properties	Wash Fastness: 4-5; Light Fastness: 5-6

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