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Quick answer: Potassium Sorbate (Cosmetic) carries the heavier risk profile. Caprylyl Glycol is allowed in the EU and allowed in the US; Potassium Sorbate (Cosmetic) is restricted in the EU and allowed in the US.
| Property | Caprylyl Glycol | Potassium Sorbate (Cosmetic) |
|---|---|---|
| EU status | Allowed | Restricted |
| US status | Allowed | Allowed |
| Risk level | low | low |
| Banned in | — | — |
| Restricted in | — | EU |
| Category | preservative | preservative |
| Where it hides | First Aid Beauty Ultra Repair Cream, Drunk Elephant C-Firma Fresh Day Serum, SkinMedica HA5 Rejuvenating Hydrator | Acure Brightening Facial Scrub, Burts Bees Body Lotion, Desert Essence Facial Cleanser |
Caprylyl glycol (1,2-octanediol) is a multifunctional ingredient derived from caprylic acid (from coconut or palm kernel oil). It serves as a skin-conditioning agent, emollient, and preservative booster with direct antimicrobial activity.
Potassium sorbate is the potassium salt of sorbic acid, a naturally occurring compound found in rowan berries. It is an antifungal and antiyeast preservative used in cosmetics, food, and personal care products.
Caprylyl Glycol: Caprylyl glycol is considered safe at cosmetic use concentrations. No carcinogenic, mutagenic, or endocrine-disrupting effects are documented. Mild skin sensitization is extremely rare. It is broadly compatible with sensitive skin and is accepted in many natural and clean beauty formulas.
Potassium Sorbate (Cosmetic): Potassium sorbate is one of the least allergenic preservatives used in cosmetics. The CIR and EU SCCS have confirmed its safety at permitted concentrations (≤0.6% in EU cosmetics, as sorbic acid equivalent). It is non-mutagenic, non-carcinogenic, and not an endocrine disruptor. Mild skin sensitization is possible but uncommon. It is widely accepted in natural and organic cosmetics certifications.
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