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Extract of rhubarb root

CAS 8016-55-5

Also registered as 1 other CAS number

90106-31-3

Concern score

Not assessed — no hazard data yet.

Extract of rhubarb root in plain language

What it is

On cosmetic ingredient lists it appears as “Rheum undulatum root/stalk/stem extract”.

Also known as Rheum undulatum root/stalk/stem extract · Rhubarb · Food - plant source, rhubarb bheum rhaponticum · Rhubarb fluid extract · Ae-rhubarb · Allergenic extract- rhubarb bheum rhaponticum

Show all 16 names

Garden rhubarb · Rheum rhabarbarum stem · Rhubarb allergenic extract · Rhubarb extract · Rhubarb preparation · Rhubarb stem · Raw rhubarb · Rheum rhabarbarum root extract · Rheum rhaponticum · rheum palmatum root extract

What it does

Used in cosmetics as an emollient, a skin-conditioning agent and an astringent. Rheum Undulatum Root/Stalk/Stem Extract is an extract of the stems, stalks and roots of Rhubarb, Rheum undulatum L., Polygonaceae.

  • Emollient
  • Skin conditioning
  • Astringent
  • Tonic
  • Humectant
  • Conditioner
Is it a concern?
We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

Regulation

No restrictions found. Extract of rhubarb root appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • USFDAlisted in openFDA substance2 entries
    • openFDA substance registry classifies this ingredient as concept.Source →
    • openFDA substance registry classifies this ingredient as structurallydiverse.Source →
  • EUCosIngActiveRheum Undulatum Root/Stalk/Stem Extract is an extract of the stems, stalks and roots of Rhubarb, Rheum undulatum L., Polygonaceae
    • Rheum Undulatum Root/Stalk/Stem Extract is an extract of the stems, stalks and roots of Rhubarb, Rheum undulatum L., PolygonaceaeSource →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 1 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Astringent, Humectant, Softener and conditioner.
    • EPA CPDat observed this chemical in 1 composition records across product categories including Personal care. EPA CPDat classifies this chemical for functional uses including Astringent, Humectant, Softener and conditioner.Source →

Expert safety opinions

No expert opinion on file for Extract of rhubarb root. 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 Extract of rhubarb root yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

5 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • EPA Chemical and Products Database

    exposure · updated July 2019

    Open →
  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    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.

Where it has been recorded

How often EPA CPDat has listed Extract of rhubarb root in a product composition. These are source records, not Greenveil catalog products.

Source records

1

Named organisations

4

Personal care

Typical roles

EmollientSkin conditioningAstringentTonicHumectantConditioner
See products using Extract of rhubarb root →

Catalog

Found in these products

Their ingredient lists include Extract of rhubarb root; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

Co-occurrence

Often appears with

Ingredients that frequently appear alongside Extract of rhubarb root in the catalog.