Why is azelaic acid so thick and grainy?

Azelaic acid dissolves poorly, so formulas suspend it rather than dissolving it.

Evidence

Source:: Fitton A, Goa KL. Drugs. 1991;41(5):780-98
Applies to:: Formulations containing azelaic acid
What this does not establish:: How a given product performs on your skin. Finished-product pH and concentration are rarely published, so this describes the chemistry, not a measurement of any specific product.
Last reviewed:: 2026-09-26

In practice

Azelaic acid does not dissolve easily, so formulas usually suspend it rather than dissolving it. That is why these products often feel grainy or thick, and why texture differs so much between brands at the same percentage — it reflects the suspension system, not the amount of active.

Dermasift analyses skincare formulations against published cosmetic science. This is information, not medical advice — for a diagnosed skin condition, speak to a dermatologist.

Check this against a product’s ingredient list

Why is azelaic acid so thick and grainy?

Azelaic acid dissolves poorly, so formulas suspend it rather than dissolving it.

Evidence

Source:: Fitton A, Goa KL. Drugs. 1991;41(5):780-98
Applies to:: Formulations containing azelaic acid
What this does not establish:: How a given product performs on your skin. Finished-product pH and concentration are rarely published, so this describes the chemistry, not a measurement of any specific product.
Last reviewed:: 2026-09-26

In practice

Dermasift analyses skincare formulations against published cosmetic science. This is information, not medical advice — for a diagnosed skin condition, speak to a dermatologist.

Check this against a product’s ingredient list