The Skin Formulary
IngredientsBrandsJournalShop
Browse Products

Researched by Helena DeMaria-Williams

Formula IngredientEmollient, Surfactant, Emulsifier

Coconut Acid

INCI: Coconut Acid

Coconut Acid is a collective term for the blend of free fatty acids derived from coconut oil (Cocos Nucifera) through hydrolysis with water or steam. The resulting mixture is predominantly saturated and consists of lauric acid (C12), myristic acid (C14), palmitic acid (C16), caprylic acid (C8), and capric acid (C10). In cosmetic formulations it functions simultaneously as a cleansing surfactant, emollient, and emulsifying agent, helping to remove oils and debris, soften the skin surface, and stabilise oil-in-water or water-in-oil emulsions.

Category

Emollient, Surfactant, Emulsifier

Irritation Risk

Low

Skin Types

normal, oily, combination

What does this do in a formula?

cleansing, emolliency, emulsification, foam production, skin softening

Is Coconut Acid safe? Key considerations

Can Coconut Acid cause irritation?

Low Risk

The CIR Expert Panel assessed Coconut Acid and related coconut-derived ingredients as safe at typical cosmetic concentrations. Animal patch testing showed a Primary Irritation Index of 0.13–0.17/4.0, indicative of minimal irritation. At normal use levels, it is not a primary irritant or sensitiser. Individuals with a known coconut allergy should patch test. No EU CosIng Annex II or III restrictions apply.

Does Coconut Acid increase sun sensitivity?

No Risk

Coconut Acid has no photosensitising properties. It does not increase UV sensitivity and no special sun protection precautions are required based on its presence in a formulation.

Is Coconut Acid safe during pregnancy?

Safe

No specific reproductive or developmental safety concerns have been documented for topical use of Coconut Acid at typical cosmetic concentrations. It is not flagged by EWG or the CIR as a pregnancy concern. As a general precaution, consult a healthcare provider for any individual concerns.

How does Coconut Acid work?

Coconut Acid is a collective term for the blend of free fatty acids derived from coconut oil (Cocos Nucifera) through hydrolysis with water or steam. The resulting mixture is predominantly saturated and consists of lauric acid (C12), myristic acid (C14), palmitic acid (C16), caprylic acid (C8), and capric acid (C10). In cosmetic formulations it functions simultaneously as a cleansing surfactant, emollient, and emulsifying agent, helping to remove oils and debris, soften the skin surface, and stabilise oil-in-water or water-in-oil emulsions.

Individuals with acne-prone skin (in leave-on formulations), known coconut allergy, dry or sensitive skin without additional moisturising ingredients should review the considerations above before use.