Description

Mordant Red 7 is a synthetic azo dye belonging to the mordant dye class, known for its ability to form stable, colored complexes with metal ions. This property is critical for achieving vibrant, wash-fast shades on various substrates, particularly natural fibers. It is an essential industrial colorant for manufacturers in the textile, leather, and specialty paper industries seeking durable coloration. The compound is supplied under the identifier CAS NO 3618-63-1.

Application

• Textile Dyeing: Primarily used for dyeing wool, silk, and nylon, where it forms stable complexes with chromium or aluminum mordants to produce red shades with excellent light and wash fastness.
• Leather Finishing: Applied in the coloring of leather goods, providing rich, penetrating color that is resistant to rubbing and perspiration.
• Paper Staining: Employed for the coloration of specialty papers, including decorative and security papers, where color consistency is paramount.
• Biological Staining (Histology): Used in laboratory settings as a histological stain for microscopic tissue analysis, often in combination with other dyes.
• Wood Staining: Suitable for imparting color to wood surfaces, offering good penetration and UV stability when properly sealed.
• Ink Formulation: A component in the manufacture of certain inks for non-food contact applications, valued for its color strength.

Basic Information

Product Name	Mordant Red 7
CAS No.	3618-63-1
Molecular Formula	C15H11N2NaO5S
Molecular Weight	354.31 g/mol
Synonyms	Acid Alizarin Red GG; Alizarin Red GG; Alizarin Red S; Alizarin Red GG Sodium Salt; Alizarinsulfonic Acid Sodium Salt; C.I. 58005; C.I. Mordant Red 7; Mordant Red 7 Sodium Salt; 3,4-Dihydroxy-9,10-dioxo-2-anthracenesulfonic Acid Sodium Salt; Sodium Alizarinsulfonate
EINECS	222-819-5

Quality Control

Our Mordant Red 7 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against comprehensive specifications for color strength, purity, and solubility. A Certificate of Analysis (COA) detailing results for key parameters such as assay, heavy metal content, and identification is provided with every shipment 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. The product is light-sensitive and should be stored away from direct light exposure to prevent degradation.

Specification

Item	Specification
Appearance	Reddish-brown to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100% ± 5% (vs. Standard)
Loss on Drying	Max. 5.0%
Sulfated Ash	Max. 20.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Clear, red solution

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