Sodium Ethylparaben

Product Description

Sodium Ethylparaben is the highly water-soluble sodium salt of ethylparaben, specifically designed for high-efficiency cosmetic manufacturing. This innovative salt form overcomes the solubility limitations of traditional ethylparaben, dissolving instantly in the aqueous phase without the need for high-heat processing or organic solvents. It provides powerful, broad-spectrum protection against bacteria, yeasts, and molds, making it an essential component for protecting water-based formulations. As a commercially strategic preservative, it is ideal for B2B manufacturers looking to optimize energy costs while ensuring the highest standards of product safety and microbial stability.

Product Specification

• INCI Name: Sodium Ethylparaben
• CAS No.: 35285-69-9
• Chemical Name: Sodium Ethyl 4-hydroxybenzoate
• Product Type: Water-Soluble Preservative
• Appearance: White crystalline powder
• Purity (Assay): ≥ 99.0%
• Solubility: Freely soluble in water
• pH (0.1% aqueous solution): 9.5 – 10.5

Key Benefits & Applications

• Cold Process Ready: Dissolves rapidly at room temperature, facilitating energy-efficient manufacturing and simplifying the production of clear aqueous systems.
• Enhanced Oil-Water Interfacial Protection: Once pH-adjusted, the ethyl ester migrates effectively to protect the critical boundaries of emulsions where microbes often thrive.
• Broad-Spectrum Performance: Offers a higher degree of anti-fungal activity compared to the methyl ester, providing a more robust shield against molds and yeasts.
• High Compatibility: Stable in various cosmetic bases and compatible with a wide array of surfactants and active ingredients.
• Applications: Perfect for water-based gels, liquid foundations, high-clarity toners, moisturizing body washes, and lightweight O/W lotions.

Formulation Guidelines

• Suggested Dosage: 0.1% – 0.3% (Maximum concentration limits are based on the ethylparaben acid equivalent).
• pH Stability: Highly effective across a broad pH range of 3.0 – 8.5. Optimal stability is achieved when the final formula is adjusted to pH 5.0 – 7.0.
• Processing: Add directly to the water phase during the initial mixing stage. Due to its alkaline nature, always monitor and adjust the final batch pH after addition.
• Technical Note: In highly acidic environments (below pH 3.5), the active ester may precipitate; ensure the formulation remains within the recommended pH range.
• Synergy: Combine with Sodium Methylparaben to create a cost-effective, fully water-soluble preservative blend that offers 360° protection for complex personal care products.