Should I Avoid cyclotetrasiloxane During Pregnancy? | VeriMom

What to use instead

Pregnancy-safe ingredients that serve a similar function:

Pregnancy-safe products to use instead

Products built around the safer ingredients above, scored "no known risks" or "low risk".

Avero

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Avero Solid Deodorant

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L'Occitane

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L´Occitane Powder To-mousse Facial Exfoliator

Unknown

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Sustain Yourself

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Sustain Yourself Natural Deodorant

Bitamin

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Bitamin Natural Deodorant N'orange

Routine

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Routine Sweet Jane Deodorant Jar

Laura Mercier

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Laura Mercier Tinted Moisturizer Broad Spectrum Spf 20 - Oil Free

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bareMinerals

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bareMinerals Complexion Rescue Tinted Hydrating Gel Cream SPF 30

Pregnancy-Safe Alternatives to cyclotetrasiloxane | VeriMom

Ingredients — Pregnancy-Safe Ingredients Database — 28,000+ Ingredients Rated

See also

• Is cyclotetrasiloxane safe during pregnancy?
• Is cyclotetrasiloxane safe for babies?
• What are pregnancy-safe alternatives to cyclotetrasiloxane?

FAQ

Is cyclotetrasiloxane safe during pregnancy?

Octamethylcyclotetrasiloxane (D4; CAS 556-67-2) has a harmonised CLP classification Repr. 2 (H361f) in ECHA’s Annex VI (CLH) and is listed with aquatic chronic H410; ECHA’s CLH and registration dossiers report reproductive effects in rodent studies and mechanistic papers describe possible endocrine-related modes of action, supporting a suspected reproductive hazard (h=2, m=2). Topical cosmetic exposure is generally lower than inhalation in animal studies; dermal absorption is measurable but limited for this volatile, lipophilic siloxane, so exposure from typical cosmetic use is scored low but measurable (e=1). Sources: ECHA CLH / brief profile; rodent reproductive studies and mechanistic reviews.

Is cyclotetrasiloxane safe while breastfeeding?

Harmonised H361f (ECHA) and animal reproductive/developmental data justify treating D4 as a suspected reproductive toxicant (h=2) with demonstrated mechanistic evidence of endocrine-related effects in rodents (m=2). D4 is lipophilic and bioaccumulative in tissues and therefore has potential to partition into milk; for a breastfeeding parent systemic exposure and transfer to milk are plausible from repeated exposure—exposure scored moderate (e=2). Key regulatory/peer-reviewed sources report bioaccumulation and reproductive findings supporting this assessment.

Is cyclotetrasiloxane safe for baby skin?

Because D4 carries a harmonised Repr. 2 classification (H361f) and rodent data indicate reproductive/developmental effects and endocrine-related modes of action, the hazard (h=2) and mechanism (m=2) are applied. Measurable dermal absorption for adults is reported (e=1); per your instruction baby-skin exposure is increased by +1 when adult absorption is measurable, giving e=2 for ages 0–3. Note: EU measures restrict/ban D4 in cosmetic products due to environmental and health concerns, reflecting the regulatory weight behind the hazard designation.

How does VeriMom score cyclotetrasiloxane?

VeriMom scores cyclotetrasiloxane at 20/100 (high risk) based on EU CosIng status, ECHA hazard classifications, and peer-reviewed PubMed studies. Our scoring pipeline is fully transparent.

What are pregnancy-safe alternatives to cyclotetrasiloxane?

See our curated list of pregnancy-safe alternatives to cyclotetrasiloxane based on similar function and a no-known-risks safety band.