Leucidal® Liquid SF (Salicylate-Free) | Natural Preservative

Leucidal® Liquid SF is a salicylate-free, probiotic-based preservative that provides broad-spectrum antimicrobial protection using nature’s own defense mechanisms. Created through the fermentation of Lactobacillus — the same beneficial bacteria found in traditional fermented foods like kimchi and sauerkraut — this innovative preservative works by producing antimicrobial peptides known as bacteriocins.

These naturally occurring compounds inhibit the growth of harmful bacteria, yeast, and mold, providing an effective, gentle preservation system for natural and organic cosmetic formulations.

Listed on the Whole Foods Acceptable Premium Preservative List, Leucidal® Liquid SF is widely recognized for its mildness and versatility, making it an excellent choice for sensitive-skin formulations and clean beauty products.

Key Benefits

• Natural & Non-Toxic: 100% derived from fermentation — no parabens, no synthetic chemicals
• Broad-Spectrum Protection: Effective against bacteria, yeast, and fungi
• Whole Foods Approved: Meets premium clean formulation standards
• Mild & Non-Irritating: Ideal for sensitive or reactive skin
• Heat Stable: Retains effectiveness up to 70°C (158°F)
• Flexible pH Range: Performs best between pH 3–8
• Compatible with Most Systems: Works in emulsions, toners, and gels

Formulation Tips

• Use Level: 2.0–4.0%
• Solubility: Water-soluble
• pH Range: 3.0–8.0
• Phase Addition: Add during the cool-down phase below 70°C (158°F)
• Thickeners: For formulas containing xanthan gum or Carbopol Ultrez 10, add Leucidal® SF before thickening agents
• Testing: Always perform a microbial challenge test to ensure adequate preservation

Specifications

• INCI Name: Lactobacillus Ferment
• Appearance: Clear to hazy, colorless to yellow liquid
• Solubility: Water-soluble
• Applications: Skin conditioning, antimicrobial protection
• pH Range: 4.0–11.0 (optimum performance 3.0–8.0)
• Suggested Use Levels: 2.0–4.0%
• Shelf Life: 12 months, properly stored in a sealed container
• Storage: Store in a cool, dry place away from direct light and humidity (50°–77°F / 10°–25°C)

Common Uses

✅ Facial creams, serums & lotions
✅ Toners & hydrating mists
✅ Cleansers & gels
✅ Hair care & scalp treatments
✅ Sensitive skin & baby care formulations

Natural Living Note

Inspired by nature’s own preservation system, Leucidal® Liquid SF protects your formulations with the same probiotics that safeguard living ecosystems. Gentle, effective, and sustainable — it’s a trusted ally for formulators who believe purity and performance can coexist.

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