INCI: Caprylyl Glycol - Also known as: 1,2-Octanediol, Octylene Glycol

QUICK FACTS

What is Caprylyl Glycol?

Caprylyl glycol (1,2-octanediol) is a glycol derived from caprylic acid - a C8 medium-chain fatty acid obtained from coconut or palm kernel oil. Its structure bridges the chemistry of glycols and medium-chain fatty acids: it has the water-miscibility of a short-chain glycol alongside the mild lipophilicity of a C8 fatty chain. This dual character gives it both skin-conditioning emollient properties and antimicrobial co-preservative activity - making it a multifunctional ingredient that contributes to both the skin feel and the preservation system of the formulas it is included in.

Caprylyl glycol's antimicrobial action is studied in connection with its interaction with microbial cell membranes, where its fatty chain disrupts membrane integrity at low concentrations. In combination with phenoxyethanol and ethylhexylglycerin, it completes the three-component preservation system in Sweet Chemistry's water-based formulas - each component addressing different aspects of the microbial challenge and together achieving broad-spectrum antimicrobial protection at lower individual concentrations than any single preservative would require.

Caprylyl glycol is frequently listed near or alongside ethylhexylglycerin on ingredient lists, and the two are often formulated as a matched pair - ethylhexylglycerin potentiating the primary preservative at the bacterial surface, caprylyl glycol providing an additional antimicrobial and conditioning layer. At Sweet Chemistry they appear together in the final section of the ingredient list in all three water-based formulas, reflecting their shared functional role.

What does it do for skin?

Caprylyl glycol's contributions to skin are twofold. In its co-preservative role, it helps maintain the microbial safety and stability of the formula - protecting the active ingredients from contamination throughout the product's use cycle and ensuring consistent active delivery from first application to last.

As a skin conditioner, caprylyl glycol's mild lipophilic character contributes to a smooth, comfortable skin feel at the point of application. Unlike purely hydrophilic glycols that can have a slightly sticky feel at higher concentrations, caprylyl glycol's medium-chain fatty character gives it a more elegant, skin-like texture contribution. This is a secondary but genuine benefit that complements the emollient system of the broader formula.

Caprylyl glycol is also associated with mild humectant-adjacent character - its glycol structure, like propanediol and other short-chain glycols, has some moisture-attracting affinity that contributes to the overall hydration environment of the formula at low concentrations. This is a minor contribution compared to the dominant humectants in the formula, but it means caprylyl glycol contributes to skin feel and moisture in addition to its preservation role - a multi-function character consistent with Sweet Chemistry's philosophy of every ingredient earning its place.

FOUND IN

In 3 Formulas

Caprylyl glycol completes Sweet Chemistry's three-component preservation system in all three water-based formulas, contributing both antimicrobial protection and skin-conditioning character within the preservation layer.

Nourishment - All Skin Types

Barrier Repairing Hydra-Serum Caprylyl Glycol (Preservation System) - 1.0 oz / 30 ml

The Hydra-Serum's three-component preservation system - phenoxyethanol, ethylhexylglycerin, and caprylyl glycol - protects a 40%-active emulsion containing 3% Matrikynes® peptides, 5% niacinamide, and 3% ceramides throughout the product's use cycle.

Hydration - Dry to Normal

Elasticity Reinforcing Hydra-Cream Caprylyl Glycol (Preservation System) - 1.7 oz / 50 ml

In the Hydra-Cream, caprylyl glycol contributes to the preservation system that maintains the stability of a 40%-active formula containing 3% Matrikynes® peptides, 2% THD ascorbate, and the full ceramide barrier complex.

Hydration - Dry to Dehydrated

Elasticity Reinforcing Lipid-Cream Caprylyl Glycol (Preservation System) - 1.7 oz / 50 ml

In the Lipid-Cream, caprylyl glycol protects the integrity of a 46%-active formula - the highest active concentration in the water-based Sweet Chemistry range - from first pump to last.

WORKS TOGETHER WITH

Primary Preservative Phenoxyethanol

INCI: Phenoxyethanol.

The primary antimicrobial preservative in all three water-based formulas. Synergy Note: Caprylyl glycol provides complementary antimicrobial action that broadens the spectrum of the preservation system while allowing phenoxyethanol to function at a lower individual concentration - a multi-component approach that achieves better coverage with a lower overall preservative load.

Co-Preservative Ethylhexylglycerin

INCI: Ethylhexylglycerin.

A glyceryl ether co-preservative present alongside caprylyl glycol in all three water-based formulas. Synergy Note: Ethylhexylglycerin and caprylyl glycol are frequently formulated as a matched co-preservative pair - their combined surface-active and membrane-disrupting characters potentiate phenoxyethanol's primary action from complementary directions.

Packaging Innovation Glass Airless System

Sweet Chemistry's water-based formulas are housed in the world's first ultralight glass airless system, reducing environmental contamination at the point of use. Synergy Note: The airless delivery system and the three-component preservation system are complementary - packaging minimizes contamination while caprylyl glycol and the other preservatives protect against any microbial growth within the formula across its full use period.

ECM Peptide Complex Matrikynes® Bone Peptides

INCI: Hydrolyzed Cow Bone Extract.

At 3% in all four formulas. Synergy Note: Caprylyl glycol's co-preservative role helps maintain the microbiological integrity of the formula environment in which Matrikynes® peptides are active - effective preservation is foundational to consistent peptide delivery.