Ingredient dictionary

Triethyl Citrate

Triethyl Citrate is the ethyl ester of citric acid, a clear, oily liquid. It is mainly used as a solvent and plasticizer, helping ingredients blend and films stay flexible. It is on the label of 27 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What Triethyl Citrate does

Helps other ingredients dissolve and blend
Keeps films flexible rather than brittle
Adds a light, smooth skin feel

Triethyl Citrate is made by combining citric acid with ethanol, a process called esterification. The result is a clear, oily liquid that spreads easily on the skin. Citric acid is the same acid found in citrus fruit, though the version used in cosmetics is produced through industrial chemistry.

Formulators use it mainly as a solvent, which means it helps other ingredients dissolve and blend evenly. It also works as a plasticizer, a term for an ingredient that keeps films flexible rather than brittle. You will often see it in deodorants, sunscreens, body washes, serums and moisturizers, where it can help UV filters spread smoothly and leave a light, soft feel.

Good for

Suits most skin types and people who like light, smooth products that feel easy to wear.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is Triethyl Citrate safe to use?

It is generally well tolerated and is used across many everyday products. As with any ingredient, a small number of people may react. If a new product stings, itches or turns red, stop using it and check with a dermatologist.

Is Triethyl Citrate vegan?

The label alone usually does not say. Its ethanol and citric acid can come from plant-based or synthetic sources. If this matters to you, check the brand's sourcing information or contact them before buying.