SkinAtlas
Ingredient library / Cyclotetrasiloxane
Solvent / vehicle ingredient

Cyclotetrasiloxane

INCI: CYCLOTETRASILOXANE

A cyclic volatile silicone (D4, octamethylcyclotetrasiloxane) used as a lightweight carrier solvent. Restricted in the EU due to environmental persistence and bioaccumulation concerns (PBT substance).

Also known as: d4 silicone, octamethylcyclotetrasiloxane, d4

solventemollientcarrier

Benefits

  • ✓Lightweight carrier solvent that evaporates cleanly
  • ✓Improves spreadability

Watch for

  • ⚠EU-restricted: prohibited in wash-off cosmetics and capped at 0.1% in stay-on products under REACH Annex XVII (Regulation 2020/2204) due to persistence, bioaccumulation, and potential endocrine-disruption concerns
  • ⚠Avoid in leave-on products where EU compliance is required

Compatibility

✓ Works well with
+ Dimethicone
At a glance
CategorySolvent / vehicle
IrritancyLow–moderate
Beginner-friendlyYes
In your routine

Pairs well with Dimethicone.

Found in 1 product
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Products with Cyclotetrasiloxane

Allerbarrier Essence BB SPF50+Sunscreen
d program
Allerbarrier Essence BB SPF50+