Ask KBeauty Verified™

KBeauty Verified™ — K-beauty checked against official records from Korea, the EU and the U.S.

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Thuja Occidentalis Stem Oil

Korean: 서양측백나무줄기오일 · CAS 90131-58-1 · Functions: perfuming

KR South Korea (MFDS)

Prohibited only in certain forms or uses MFDS prohibited ingredients

Conditions (official MFDS text, Korean):
과산화물가가 10mmol/L을 초과하는 경우에 한하여 금지

Source: MFDS — cosmetic ingredient use restrictions · checked Oct 17, 2026

EU European Union (CosIng)

Restricted Annex III/119

Conditions: Peroxide value less than 10 mmoles/L (15)

Required label warning: (15 ) This limit applies to the substance and not to the finished cosmetic product.’

Source: EU CosIng — Annex III · checked Oct 17, 2026

US United States (FDA)

No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.

Also listed as

THUJA OCCIDENTALIS STEM OIL 서양측백나무줄기오일

Information only, not medical advice. Rules change — always check the linked official source. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist.

Frequently asked questions

Is Thuja Occidentalis Stem Oil banned in the European Union?

In the EU's CosIng records it is listed as “Restricted” (EU CosIng — Annex III). A restricted ingredient is allowed within the stated conditions.

Is Thuja Occidentalis Stem Oil banned in South Korea?

In Korea's MFDS records it is listed as “Prohibited only in certain forms or uses” (MFDS — cosmetic ingredient use restrictions). It is not a general ban; see the condition on the ingredient page.

Is Thuja Occidentalis Stem Oil allowed in cosmetics in the U.S.?

We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.

What is Thuja Occidentalis Stem Oil used for in cosmetics?

The EU's CosIng inventory lists its functions as: perfuming.

What is Thuja Occidentalis Stem Oil called on Korean labels?

Korea's MFDS standard Korean name is 서양측백나무줄기오일.

What is the CAS number of Thuja Occidentalis Stem Oil?

CAS 90131-58-1 (from official records).