Erythrosine Al Lake (FD&C Red 3) CAS 16423-68-0

Erythrosine Al Lake (FD&C Red 3 Al Lake) – High-Stability Pigment for Cosmetics, Food, and Pharmaceuticals

Basic Information

• CAS Number: 16423-68-0

• Chemical Name: Disodium 2',4',5',7'-tetraiodo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one (Erythrosine B sodium salt)

• CI Number: 45430:1 (Aluminum Lake)

• Molecular Formula: C₂₀H₈I₄O₅·2Na (for the dye base)

• Appearance: Purple-red fine powder, odorless

• Solubility: Insoluble in water and organic solvents; dissolves in salt solutions; slowly soluble in acidic and alkaline aqueous media

• Stability: Better light and heat stability than Erythrosine B (soluble dye)

Overview
Erythrosine Al Lake is the aluminum-based lake pigment derived from Erythrosine B (FD&C Red 3). The dye is precipitated onto an aluminum hydroxide substrate, producing a water-insoluble pigment with improved heat and light stability compared to the soluble dye. This makes it ideal for applications where color migration, bleeding, or stability are concerns. It is widely used in cosmetics, food, pharmaceuticals, and industrial products.

Applications

• Cosmetics: Used in lip glosses, lipsticks, blushes, eye shadows, and other decorative makeup products for bright red to pink shades.

• Food products: Provides stable red coloration in dairy products, meat products, baked goods, noodles, and flavorings.

• Pharmaceuticals: Added to health supplements, tablets, capsules, and pharmaceutical excipients as a colorant.

• Industrial production: Applied in petroleum, manufacturing, agricultural products, battery components, and precision casting.

• Tobacco: Can replace glycerin for tobacco flavoring, antifreeze, and humectant applications.

• Animal feed: Used in pet food, livestock feed, aquatic feed, vitamin supplements, and veterinary products.

Key Properties

• High color strength and purity.

• Insoluble in water and organic solvents – prevents bleeding and migration.

• Superior light and heat stability compared to soluble Erythrosine B.

• Good dispersibility and fineness for uniform color distribution.

• Complies with regulatory standards for cosmetic, food, and pharmaceutical use.

Handling and Storage

• Store in a cool, dry, well-ventilated area, away from direct sunlight and moisture.

• Keep containers tightly sealed to prevent contamination.

• Use appropriate personal protective equipment (dust mask, gloves, safety goggles) when handling.

Packaging
Available in 1 kg, 5 kg, 25 kg, and 50 kg containers (bags, drums). Custom packaging upon request.

Quality Assurance
Each batch is tested for color intensity, purity, heavy metals, particle size distribution, and light/heat stability to ensure consistent quality and regulatory compliance.