Korean: 사이클로테트라실록세인 · CAS 293-51-6 ,556-67-2 · Functions: hair conditioning, skin conditioning - emollient, solvent
No specific rule on file.
No specific rule on file.
Banned in some U.S. states CA-TFCA
Conditions: California: Toxic-Free Cosmetics Act (AB 2762, Ch. 314, Stats. 2020), as amended by AB 496 (Ch. 441, Stats. 2023), AB 60 'Musk Reduction Act' (Ch. 432, Stats. 2025) and SB 39 (Ch. 208, Stats. 2025) · Cal. Health & Safety Code §108980 (subd. (a) 2025 list; (b) 2027 list; (c) musk ketone; (d) trace exemption; (f) boric acid suppositories) · From 2027-01-01 · intentionally added
Source: California — Toxic-Free Cosmetics Act (AB 2762, Ch. 314, Stats. 2020), as amended by AB 496 ( · checked Oct 17, 2026
Banned in some U.S. states VT-ACT131
Conditions: Vermont: Act 131 of 2024 (S.25) — Chemicals in Cosmetic and Menstrual Products · 9 V.S.A. §2494b · From 2027-07-01 · intentionally added
Source: Vermont — Act 131 of 2024 (S.25) — Chemicals in Cosmetic and Menstrual Products · checked Oct 17, 2026
How Cyclotetrasiloxane is treated in 1 more market, from the overseas cosmetic regulation database compiled by Korea's MFDS. Always confirm with the regulator of that country before selling there.
| Market | Status | Conditions |
|---|---|---|
| AS ASEAN (10 countries) | Prohibited | — |
Source: MFDS cosmetic ingredient use restrictions — overseas regulations · checked Oct 17, 2026
Cyclotetrasiloxane 사이클로테트라실록세인
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.
We found no specific rule for it in the EU's CosIng records. That is not an approval or a safety statement.
We found no specific rule for it in Korea's MFDS records. That is not an approval or a safety statement.
In the FDA's records it is listed as “Banned in some U.S. states” (California — Toxic-Free Cosmetics Act (AB 2762, Ch. 314, Stats. 2020), as amended by AB 496 ().
The EU's CosIng inventory lists its functions as: hair conditioning, skin conditioning - emollient, solvent.
Korea's MFDS standard Korean name is 사이클로테트라실록세인.
3 products we checked list it, for example CLIO Ink Airy Velvet, Peripera Ink Airy Velvet, Missha M Perfect Cover BB Cream SPF 42 PA+++(50ml).
CAS 293-51-6 ,556-67-2 (from official records).