C18-21 Alkane is a high-purity mixture of saturated hydrocarbons with 18-21 carbon chains, serving as an inert, non-polar emollient and solvent in cosmetic formulations.

This versatile ingredient delivers fresh slip with a soft, low-shine/matte after-feel while adding cushion compared to shorter alkanes. It serves as an excellent silicone alternative, replacing isohexadecane and dimethicone/dimethiconol in many systems, with good UV stability and broad oil compatibility.

C18-21 Alkane excels in suncare formulations by reducing filter tackiness and enabling elegant spread. Its longer chain structure (C18-21) provides a richer, more substantive feel than C13-19 grades, making it particularly suited for creams, masks, and conditioning finishes. The ingredient remains stable across extreme pH and oxidizing/reducing conditions.

Usage: Skin care (creams, lotions, serums), hair care (creams, masks, serums), color cosmetics (foundations, sticks), suncare products

How to mix:

- Add to oil phase during hot or cold process

- Highly compatible with esters, vegetable/mineral oils, silicones, UV filters, and pigments

- Can soften/thin thick oil phases - balance with waxes/structurants as needed

- For sensory tuning: blend with C15-19 alkanes for drier feel or C21-28 for richer payoff

Usage rate: 0.5-20% (Skin/body: 0.5-7%, Hair care: 1-15%, Color cosmetics: 1-20%)

Product Description: Clear, colorless to pale yellow, low-viscosity liquid with neutral odor

Solubility: Soluble in oils, esters, and other hydrocarbons; insoluble in water and glycols

Storage: Store in tightly closed container at room temperature, away from heat and direct sunlight. Shelf life 24 months

INCI Name: C18-21 Alkane

Listed in EU CosIng (Ref. 54903), Non-irritant, Non-sensitizing, Non-comedogenic