Description

C.I. Reactive Blue 187 is a high-performance, vinyl sulfone-based reactive dye renowned for its brilliant blue hue and excellent fastness properties. This product is engineered to deliver superior color yield and fixation efficiency on cellulosic fibers, making it a critical component for achieving vibrant and durable coloration. It is primarily utilized by textile manufacturers and dye producers seeking reliable, high-quality dyes for cotton, viscose, and other natural fiber applications.

Application

• Exhaust dyeing and continuous dyeing of cotton fabrics.
• Pad-batch and pad-steam dyeing processes for cellulosic fibers.
• Coloration of viscose rayon and other regenerated cellulose materials.
• Used in the formulation of specialty dye mixtures and ink-jet inks for textiles.
• Application in laboratory research and development of new dyeing techniques.

Basic Information

Product Name	C.I. Reactive Blue 187
CAS No.	89286-75-9
Molecular Formula	C29H19ClN7Na3O11S3
Molecular Weight	882.13 g/mol
Synonyms	Reactive Blue 187; Reactive Blue KN-R; Remazol Brilliant Blue R; C.I. 621528; Vinylsulfone Reactive Blue 187; Sodium 4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-[(E)-2-[4-[(E)-2-(sulfonatooxy)ethenylsulfonyl]phenyl]ethenyl]-5-methylbenzenesulfonate; Levafix Blue CA; Drimarene Blue R-BL
EINECS	Contact for details

Quality Control

Our C.I. Reactive Blue 187 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analysis, including purity assay, shade verification, and strength testing, to meet the exacting standards of the global textile industry. A Certificate of Analysis (COA) detailing all test results is provided with every 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 heat sources and incompatible materials. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Dark blue powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3%
Shade	Conforms to standard
Solubility in Water	≥ 100 g/L (at 50°C)
Moisture Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0

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