SPF Scout · Ingredient

C18-21 Alkane

Solvent (dissolves other ingredients)

CAS 64742-46-7;

EU regulatory status

  • Restricted in cosmetic products in the EU

    Annex II (substances prohibited in cosmetic products), entry 875 — Distillates (petroleum), hydrotreated middle, except if the full refining history is known and it can be shown that the substance from which it is produced is not a carcinogen. — EU Cosmetics Regulation (EC) No 1223/2009, as recorded in CosIng.

This status describes European Union cosmetics law — which substances may be used in cosmetic products sold there, and under what conditions. Regulations differ by region. It is not a statement about any specific product, and it does not predict whether your skin will react.

What this ingredient generally does

A blend of oil-like liquids that acts as a solvent, meaning it dissolves and carries other ingredients. It helps keep the mix fluid and evenly blended.

Reviewed before publication. This note describes function in a formulation — nothing else.

Published formulations that list this ingredient

These are the formulations currently published in the SPF Scout catalog whose stored ingredient declaration includes this ingredient. It is not a list of every product on the market, and the order carries no meaning.

Checking this against your own list

You can select this ingredient in the SPF Scout app as one to flag. The app compares your selections against a product's stored declaration on your device; your list never reaches this website.

This comparison does not predict whether your skin will react.

Where this information comes from

Ingredient names, CAS numbers and recorded functions come from SPF Scout’s curated ingredient dictionary, grounded in CosIng, the European Commission’s Cosmetic Ingredient Database. Content © European Union, reused with acknowledgement.

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