Description

C.I. Reactive Red 37 is a high-purity, reactive dye intermediate essential for producing vibrant and wash-fast red colorants in industrial applications. Its primary value lies in its ability to form covalent bonds with cellulose fibers, ensuring excellent colorfastness and durability in the final textile products. This compound is a critical raw material for manufacturers in the textile dyeing and printing industries, as well as for producers of specialty inks and colorants.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, and other cellulose-based fabrics to achieve brilliant red shades with high wet-fastness.
• Textile Printing: Used in the formulation of printing pastes for direct and discharge printing on natural and blended fabrics.
• Leather Coloring: Imparts durable and vibrant red colors to finished leather goods.
• Paper Coloring: Employed in the production of specialty colored papers and paper products.
• Ink Manufacturing: Serves as a key intermediate for creating reactive dyes used in certain inkjet and specialty printing inks.
• Research & Development: Utilized in chemical R&D labs for synthesizing new dye derivatives and studying chromophore properties.

Basic Information

Product Name	C.I. Reactive Red 37
CAS No.	12226-14-1
Molecular Formula	C26H17ClN7Na3O11S3
Molecular Weight	877.09 g/mol
Synonyms	Reactive Red 37; C.I. 18215; Procion Red H-8B; Remazol Red RB; Levafix Red E-4BA; Drimarene Red K-4B; Reactive Brilliant Red K-2BP; 1,3,6-Naphthalenetrisulfonic acid, 8-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-, trisodium salt
EINECS	Contact for details

Quality Control

Our C.I. Reactive Red 37 is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and reactive group content, meeting the high standards required for industrial dye synthesis. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents and excessive heat. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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