Food use
Food-use source coverage is present in the current record.
The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.
- beauty
- cleaning
- food
- industrial
Thiourea
CAS 17356-08-0 · 100/100 · High conf.
Also registered as 5 other CAS numbers
53754-90-8 · 1032826-45-1 · 1429623-74-4 · 1803177-22-1 · 62-56-6
Concern score
100/100Critical concern driven by cmr.
High confidence
Thiourea in plain language
On cosmetic ingredient lists it appears as “1-Hydroxymethylimidazolidine-2-thione”.
Also known as 1-Hydroxymethylimidazolidine-2-thione · 1-Monomorpholinomethyl-2-thiourea · 3-Bis(hydroxymethyl)-3-thiourea · 3-Bis(morpholinomethyl)-2-thiourea · Hydroxymethyl-2-thiourea · 2-THIOUREA
Show all 29 names
Thiocarbamide · 2-Thiopseudourea · Isothiourea · Pseudothiourea · Pseudourea (NH2.C(OH):NH), thio- · Pseudourea, 2-thio- · Sulfourea · Sulourea · Thiocarbamid · Thiocarbonic acid diamide · Thioharnstoff · Thiokarbamid · Thiomocovina · Thiouree · Thiuronium · Tsizp 34 · Usaf EK-497 · Urea, 2-thio- · Urea, thio- · beta-Thiopseudourea · carbonothioic diamide · thiourea (sara iii) · thiourea (sara 313) (cercla)
Used in cosmetics as an antimicrobial and a humectant.
- Antimicrobial
- Humectant
- Critical concern: classified for carcinogenic, mutagenic or reproductive toxicity (CMR). It is banned in EU cosmetics.
Why it's flagged
- Cmr
Thiourea and its derivatives, with the exception of the one listed in Annex III is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
RestrictedEU EC — banned
The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.
Regulation
Restrictions first, then routine listings from published regulatory sources.
- EU Annex II — prohibited
- EU prohibited in cosmetics
- Found in consumer products
- Beauty
- Cleaning
- Pharma
- Food
- Industrial
- View source →banned
EUEC
Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products. CMR: Carcinogenic Cat. 2(),Reprotoxic Cat. 2()
USEPAcommercial use observedEPA CPDat observed this chemical in 94 composition records across product categories including Laboratory supplies, Food and drug, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Humectant, Biocide.
- EPA CPDat observed this chemical in 94 composition records across product categories including Laboratory supplies, Food and drug, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Humectant, Biocide.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Expert safety opinions
No expert opinion on file for Thiourea. 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 Thiourea yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.
Where this comes from
- Open →
CosIng
regulatory · updated 2026-09-23
- Open →
EU CosIng Cosmetics Regulation Annexes
regulatory · updated 2011-02-11
- Open →
EPA Chemical and Products Database
exposure · updated March 8, 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 →
PubChem Live Enrichment
chemistry · updated 2026-05-17
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
Where it has been recorded
How often EPA CPDat has listed Thiourea in a product composition. These are source records, not Greenveil catalog products.
Source records
94
Named organisations
6
Laboratory suppliesFood and drugCleaning products and household carePersonal careRaw materialsIndustrial products
Typical roles
AntimicrobialHumectant