Is Trimethylundecenal safe in cosmetics?
Trimethylundecenal has a safety rating of "MODERATE" in our database. EU status: permitted. US status: permitted.
Moderate
Cosmetic Ingredient
Trimethylundecenal
Also known as: 9-Undecenal, 2,6,10-trimethyl-, Adoxal, 2,6,10-trimetilundec-9-enal, 2,6,10-Trimethyl-9-undecenal, 9-undecenal, 2,6,10-trimetil- (+6 more)
INCI: TRIMETHYLUNDECENAL
Trimethylundecenal (CAS 141-13-9) is a cosmetic cosmetic ingredient functioning as Perfuming / Fragrance ingredient. NOAEL 335 mg/kg bw/day (cross-referenced against ToxValDB ECHA IUCLID); EU Regulation 1223/2009 status: permitted. 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 141-13-9 →
Auto-generated CPSR Part A draft with source citations
Function
Perfuming / Fragrance ingredient
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
2,6,10-trimethylundec-9-enal
InChIKey
UEGBWDUVDAKUGA-UHFFFAOYSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Permitted for use in cosmetics; RIFM safety-assessed
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Trimethylundecenal.
Calculate MoS for your specific formulation with the MoS Calculator.
Pre-Calculated Safety Assessment
Pre-calculated NOAEL → SED → MoS audit trail for Trimethylundecenal across SCCS product categories, with measured dermal absorption where available.
HRIPT Human Patch Test Studies
1 human repeat insult patch test aggregated from dermatological literature.
| Test Type | N | Sensitized | Dose µg/cm² | NESIL µg/cm² | Potency |
|---|---|---|---|---|---|
| HMT | - | 0 | 8100 | - | - |
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
10 - 100 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Fragrance
Regulatory List Membership (1)
IFRA Fragrance Transparency List
Expert Verdict
Expert safety assessment and concern-level summary for Trimethylundecenal.
Regulatory Flags
potential-allergen
fragrance-component
ifra_fragrance
Known Synonyms
9-Undecenal, 2,6,10-trimethyl-
Adoxal
2,6,10-trimetilundec-9-enal
2,6,10-Trimethyl-9-undecenal
9-undecenal, 2,6,10-trimetil-
2,6,10-TRIMETHYL-9-UNDECYCLENALDEHYDE
EINECS 205-460-8
Farenal
NSC 122698
Trimethyl undecylenic aldehyde
2,6,10-Trimethyl-9-undecen-1-al
Chemical Function
Fragrance
Regulatory Lists
IFRA Transparency
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Trimethylundecenal allowed in the EU?
Trimethylundecenal EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Trimethylundecenal do in cosmetics?
Trimethylundecenal functions as: Perfuming / Fragrance ingredient. It is classified as a cosmetic ingredient in our database. CAS number: 141-13-9.
Is Trimethylundecenal used outside cosmetics?
Trimethylundecenal also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Trimethylundecenal compliance across multiple jurisdictions:
Ingredient Decoder
Paste a full ingredient list for instant analysis
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
Related Ingredients
2,6-Dimethyl-7-octen-2-ol (Dihydromyrcenol)
Excellent
Same category
Fragrance (perfuming), masking
2-Ethoxy-2,6,6-Trimethyl-9-Methylenebicyclo[3.3.1]Nonane (Boisiris™)
Excellent
Same category
Fragrance (rich woody, orris/iris roo...
3,6-Dimethyl-3-Octyl Acetate
Excellent
Same category
Fragrance / Perfuming agent with flor...
3-Methyl-5-(2,2,3-Trimethyl-3-Cyclopentenyl)Pent-4-En-2-Ol (Sandalore)
Excellent
Same category
Perfuming / Fragrance (sandalwood note)
4-Tert-Butylcyclohexyl Acetate
Excellent
Same category
Fragrance
Acetoin
Excellent
Same category
Skin conditioning, fragrance
(20S)-Protopanaxadiol
Moderate
Similar safety
(Cnidium Officinale/Coptis Chinensis/Glycyrrhiza Uralensis) Root Extract
Moderate
Similar safety
Skin conditioning
(Cryptomeria Japonica/Chamaecyparis Obtusa) Stem Ferment Extract
Moderate
Similar safety
Antimicrobial, antioxidant, humectant
(Eclipta Prostrata/Houttuynia Cordata) Leaf Extract
Moderate
Similar safety
Skin conditioning
(Lepidium Meyenii/Sarcodon Aspratus) Root Water
Moderate
Similar safety
Skin conditioning
(Licorice/Reynoutria Japonica) Root/Stem Extract
Moderate
Similar safety
Skin conditioning, antioxidant
2,6-DIAMINOPYRIDINE
Good
Chemical family
Hair Dyeing
2,6-Diaminopyridine ⚠️
Poor
Chemical family
Hair dyeing (oxidative hair dye precu...
4-METHYLPENT-3-EN-2-ONE
Good
Chemical family
Perfuming
Is Trimethylundecenal in Your Products?
Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.
Try Piro Free →Analyze Your Full Ingredient List
Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Trimethylundecenal in your formulation.