Is Dimethylol Ethylene Thiourea safe in cosmetics?
Dimethylol Ethylene Thiourea has a safety rating of "MODERATE" in our database. EU status: prohibited. US status: restricted.
Moderate
Cosmetic Ingredient
Dimethylol Ethylene Thiourea
Also known as: 1,3-Bis(hydroxymethyl)imidazolidin-2-thione, BRN 0638446, Dimethylolethylenethiourea, EINECS 239-579-1
INCI: DIMETHYLOL ETHYLENE THIOUREA
Dimethylol Ethylene Thiourea (CAS 15534-95-9) is a cosmetic cosmetic ingredient functioning as Antimicrobial preservative, hair conditioning. EU Regulation 1223/2009 status: prohibited. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 15534-95-9 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Dimethylol Ethylene Thiourea is prohibited in EU cosmetics but has active industrial GHS classifications (H317, H360D).
Source: Cosmetics: ingredients.eu_status; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Antimicrobial preservative, hair conditioning
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
1,3-bis(hydroxymethyl)imidazolidine-2-thione
InChIKey
QXYJLKUVMPXXKA-UHFFFAOYSA-N
Regulatory Status
EU EU Status
prohibited
US US Status
restricted
US Notes
Permitted under current CFR; however, formaldehyde-releaser classification may subject it to upcoming FDA/state-level bans (Washington State already banned formaldehyde releasers).
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Dimethylol Ethylene Thiourea.
Calculate MoS for your specific formulation with the MoS Calculator.
Expanded Jurisdictional Detail
Additional regulatory detail beyond the 7-jurisdiction summary: Saudi SFDA, Korea MFDS, ASEAN ACD, Japan/Korea, Brazil/India, and cross-jurisdictional restriction entries.
SA Saudi SFDA (III - Restricted)
Product type: (a) Hair products (b) Nail products. Max: (a) 2% (b) 2%.
BRIN Brazil/India Cosmetics
India: Restricted · max (a) 2% (b) 2%
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Biocide
Softener and conditioner
Regulatory List Membership (1)
EU CosIng Cosmetics Ingredient Database
Expert Verdict
Expert safety assessment and concern-level summary for Dimethylol Ethylene Thiourea.
Regulatory Flags
preservative
eu_cosing_listed
Known Synonyms
1,3-Bis(hydroxymethyl)imidazolidin-2-thione
BRN 0638446
Dimethylolethylenethiourea
EINECS 239-579-1
Chemical Function
Biocide
Softener and conditioner
Regulatory Lists
Europe; Personal care; restricted
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Dimethylol Ethylene Thiourea allowed in the EU?
Dimethylol Ethylene Thiourea EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.
What does Dimethylol Ethylene Thiourea do in cosmetics?
Dimethylol Ethylene Thiourea functions as: Antimicrobial preservative, hair conditioning. It is classified as a cosmetic ingredient in our database. CAS number: 15534-95-9.
Is Dimethylol Ethylene Thiourea used outside cosmetics?
Dimethylol Ethylene Thiourea also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Dimethylol Ethylene Thiourea have different safety status in cosmetics vs industrial chemicals?
Dimethylol Ethylene Thiourea is prohibited in EU cosmetics but has active industrial GHS classifications (H317, H360D).
Compliance Tools
Check Dimethylol Ethylene Thiourea compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
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