Description

Reactive Blue 51 is a high-purity, reactive anthraquinone dye intermediate essential for creating vibrant and wash-fast blue colorants. Its primary value lies in its ability to form covalent bonds with cellulose fibers, ensuring excellent colorfastness to washing and light. This product is a critical raw material for manufacturers in the textile, leather, and specialty paper industries seeking to produce durable, high-quality colored goods.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, and other cellulosic fibers to achieve brilliant blue shades with superior fastness properties.
• Leather Finishing: Used in the coloration of leather goods, providing deep, penetrating color that is resistant to rubbing and fading.
• Paper Coloring: Employed in the production of specialty colored papers, including decorative and security papers.
• Ink Formulation: Serves as a key pigment precursor in the manufacture of certain high-performance inks for industrial printing.
• Research & Development: Utilized in chemical research and analytical laboratories as a standard or intermediate for synthesizing new dye molecules and studying reaction mechanisms.

Basic Information

Product Name	Reactive Blue 51
CAS No.	12225-62-6
Molecular Formula	C22H16ClN7O8S2
Molecular Weight	637.98 g/mol
Synonyms	Reactive Blue M-2G; C.I. Reactive Blue 51; Remazol Brilliant Blue R; Levafix Brilliant Blue E-B; Procion Blue H-EGN; Anthraquinone blue 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
EINECS	Contact for details

Quality Control

Our Reactive Blue 51 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high performance. Each lot is tested against rigorous in-house specifications, which typically include parameters for color strength, hue, solubility, and reactive group content. A Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee it meets your application 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
Identification (IR)	Conforms to Standard
Color Strength	≥ 98% (Standard)
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
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.