Description

Mordant Red 5 is a synthetic, water-soluble azo dye belonging to the mordant dye class, identified by CAS NO 3564-26-9. Its primary value lies in forming stable, insoluble colored complexes with metal ions, resulting in excellent colorfastness properties on various substrates. This dye is essential for industrial applications requiring durable and vibrant red to violet shades, particularly in the textile and leather tanning industries.

Application

• Textile Dyeing: Primarily used for dyeing wool, silk, and nylon, where it forms chelates with metal mordants like chromium or aluminum to produce fast red and violet colors.
• Leather Finishing: Employed in the coloring of leather goods, providing rich, mordanted shades with good resistance to washing and light.
• Biological Staining: Used in histology and microscopy as a staining agent for tissue samples, often in combination with other dyes.
• Ink Manufacturing: Serves as a colorant for specialty inks where metal complexation is desired for stability.
• Paper Coloring: Applied in the production of colored papers, particularly where a degree of water-fastness is required.
• Analytical Chemistry: Can be utilized as an indicator or a complexometric agent in certain laboratory procedures.

Basic Information

Product Name	Mordant Red 5
CAS No.	3564-26-9
Molecular Formula	C15H9N2Na2O8S2
Molecular Weight	478.34 g/mol
Synonyms	Acid Alizarin Red GG; Alizarin Red GG; Alizarin Red S Extra; C.I. 58005; C.I. Mordant Red 5; Chromoxane Red GG; Eriochrome Red B; Mordant Red 5; Sodium Alizarinsulfonate
EINECS	222-622-3

Quality Control

Our Mordant Red 5 is manufactured under a stringent quality management system. Each batch is tested to ensure consistent purity, color strength, and application performance. Key parameters such as dye content, solubility, shade, and fastness properties are verified. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment to guarantee compliance with your technical 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). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed when not in use to prevent moisture absorption and color degradation.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 85%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 25%
Heavy Metals (as Pb)	Max. 20 ppm

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