Verstatil® BL non GMO (INCI: Aqua, Sodium Levulinate, Sodium Benzoate) is a natural liquid preservative blend. Derived from non-GMO sugar cane, it pairs the skin-conditioning and antibacterial power of Sodium Levulinate with the globally recognized antifungal strength of Sodium Benzoate.
Key Benefits and Performance
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Superior Color Stability: A major practical advantage over sorbate-based blends is that Verstatil® BL non GMO does not cause the yellowing or color shifts often seen in surfactant-based products.
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Targeted Microbial Defense: It is rated “very good” against Gram-positive bacteria, Gram-negative bacteria, and moulds. While it provides protection against yeasts, its performance in this category is rated as “sufficient,” suggesting a benefit from boosting in high-risk formulas.
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Synergistic Hurdle Action: The blend leverages the complementary modes of action of two organic acid salts to provide a robust defense system that simplifies the preservation of water-rich products.
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Manufacturing Versatility: Supplied as a clear, colorless liquid, it is fully cold-processable. It can be added at any stage of manufacturing—from the initial water phase to the final cool-down—without affecting the clarity or aesthetics of the product.
Formulation Guidelines
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The “pH Window” for Activation: Like all organic acid systems, its efficacy is pH-dependent.
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Preservative Boosting: At the higher end of the pH range, synergistic effects are observed when combined with boosters such as Glyceryl Caprylate (e.g., Dermosoft® GMCY MB).
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When used in emulsions formulators should verify that their emulsifier system is compatible with electrolyte input, as the blend itself contains electrolytes.
