Description

C.I.Direct Red 225 is a synthetic, water-soluble azo dye belonging to the direct dye class, valued for its strong affinity to cellulose fibers. This compound is essential for achieving vibrant, wash-fast red shades in textile dyeing and printing processes. It is primarily needed by manufacturers in the textile, leather, and paper industries seeking reliable and efficient colorants for their products.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to produce a range of red hues.
• Leather Coloring: Used in the dyeing of leather goods, providing good penetration and color fastness.
• Paper Staining: Employed for coloring paper products, including specialty papers and packaging materials.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings, depending on purity grade.

Basic Information

Product Name	C.I. Direct Red 225
CAS No.	12222-49-0
Molecular Formula	C35H25N7Na2O10S2
Molecular Weight	813.78 g/mol
Synonyms	Direct Fast Scarlet 4BS; Direct Red 4BS; C.I. 29160; Pontamine Scarlet 4BS; Amanil Fast Scarlet 4BS; Sirius Scarlet 4BS; Direct Scarlet 4BS; Diazol Scarlet 4BS
EINECS	Contact for details

Quality Control

Our C.I. Direct Red 225 is produced under a strict quality management system. Each batch undergoes comprehensive testing for key parameters including color strength, shade, solubility, and impurity profile to ensure consistency and performance. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance protocols.

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.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Insolubles	Max. 0.5%
Shade	Conforms to standard sample
Fastness Properties	To be specified per grade

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