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Phaeodactylum tricornutum

Concern score

Not assessed — no hazard data yet.

Phaeodactylum tricornutum in plain language

What it is

On cosmetic ingredient lists it appears as “Phaeodactylum tricornutum extract”.

Also known as Phaeodactylum tricornutum extract · Nitzschia closterium f. minutissima · Phaeodactylum tricornutum whole

What it does

Used in cosmetics as a humectant and a soothing agent. Phaeodactylum Tricornutum Extract is an extract of the Alga, Phaeodactylum tricornutum, Bacillariophyceae.

  • Humectant
  • Soothing
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

What we know about this ingredient

FDA GSRS classifies this ingredient as ingredient substance structurallydiverse.

Regulation

No restrictions found. Phaeodactylum tricornutum appears in these published regulatory listings.

  • EUCosIngActivePhaeodactylum Tricornutum Extract is an extract of the Alga, Phaeodactylum tricornutum, Bacillariophyceae
    • Phaeodactylum Tricornutum Extract is an extract of the Alga, Phaeodactylum tricornutum, BacillariophyceaeSource →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as structurallydiverse.
    • openFDA substance registry classifies this ingredient as structurallydiverse.Source →

Expert safety opinions

No expert opinion on file for Phaeodactylum tricornutum. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for Phaeodactylum tricornutum yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

3 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →
  • openFDA Substance

    registry · updated 2026-05-24

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.