industrial
pharma

Estriol

CAS 50-27-1

Also registered as 1 other CAS number

1050676-52-2

Concern score

Not assessed — no hazard data yet.

Estriol in plain language

What it is: Also known as (16A,17B)-ESTRA-1,3,5(10)-TRIENE-3,16,17-TRIOL · 1,3,5-ESTRATRIENE-3B,16A,17B-TRIOL · 16.ALPHA.,17.BETA.-ESTRIOL · Aacifemine · Estra-1,3,5(10)-triene-3,16alpha,17beta-triol · Trihydroxyestrin
Show all 36 names
1,3,5 (10)-Estratriene-3, 16α, 17β-triol · 13β-Methyl-1,3,5(10)-gonatriene-3,16α,17β-triol · 16.ALPHA.-HYDROXYESTRADIOL · 16alpha-Hydroxyestradiol · 16α,17β-Estriol · 16α-Estriol · 16α-Hydroxyestradiol · Colpogyn · Destriol · Deuslon-A · E3 · ESTRA-1,3,5(10)-TRIENE-3,16,17-TRIOL, (16.ALPHA.,17.BETA.)- · Estra-1,3,5(10)-triene-3,16,17-triol, (16α,17β)- · Estratriol · Estriol (medication) · Hemostyptanon · Hormomed · Incurin · Klimoral · Oestratriol · Oestriolum · Orestin · Ortho-Gynest · Overstin · Ovestin · Ovestrion · Theelol · Tridestrin · Triovex · oestriol
What it does: We don't have a plain-language description for Estriol yet.
Is it a concern?: We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Estriol appears in these published regulatory listings.

In marketed US drugs

Recorded in these product areas

Found in consumer products
Industrial

USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.
- EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products.Source →
USFDAmarketed drug occurrenceFDA NDC lists this ingredient in 24 active drug products and 25 total products.
- FDA NDC lists this ingredient in 24 active drug products and 25 total products.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →

Evidence & sources

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

6 data sources

Where this comes from

EPA Chemical and Products Database
exposure · updated February 2011
Open →
EPA DSSTox Identifiers
chemistry · updated 2025-12-29
Open →
FDA National Drug Code Directory
regulatory · updated 2027-12-31
Open →
FDA GSRS UNII
registry · updated 2026-02-26
Open →
openFDA Substance
registry · updated 2026-05-24
Open →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Open →

Reference links (2)

Openfda substance

en.wikipedia.org

Read →

Openfda substance

ema.europa.eu

Read →

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 FDA National Drug Code directory has listed Estriol in a product composition. These are source records, not Greenveil catalog products.

Source records

See products using Estriol →

Catalog

Found in these products

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

See all 3 →Find products without it →