Is Dimethyl-3-methylpentadienyl-oxirane safe in cosmetics?
Dimethyl-3-methylpentadienyl-oxirane has a safety rating of "MODERATE" in our database. EU status: prohibited. US status: permitted.
Moderate
Cosmetic Ingredient
Dimethyl-3-methylpentadienyl-oxirane
Also known as: 2,2-Dimethyl-3-(3-methyl-2,4-pentadienyl)oxirane, 2,2-Dimethyl-3-(3-methyl-2,4-dimethyl-pentadienyl)oxirane, EINECS 273-870-4, 6,7-Epoxy-3,7-dimethyl-1,3-octadiene
INCI: DIMETHYL-3-METHYLPENTADIENYL-OXIRANE
Dimethyl-3-methylpentadienyl-oxirane (CAS 69103-20-4) is a cosmetic cosmetic ingredient functioning as Fragrance (synonym: Myroxyde). 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 69103-20-4 →
Auto-generated CPSR Part A draft with source citations
Cross-Vertical Regulatory Divergence
Dimethyl-3-methylpentadienyl-oxirane is prohibited in EU cosmetics but has active industrial GHS classifications (H317).
Source: Cosmetics: ingredients.eu_status; Chemicals: ghs_classifications.signal_word/hazard_statement_code
Function
Fragrance (synonym: Myroxyde)
Safety Rating
MODERATE
Chemistry & Identifiers
IUPAC Name
2,2-dimethyl-3-(3-methylpenta-2,4-dienyl)oxirane
InChIKey
LIMXJCIGROLRED-UHFFFAOYSA-N
Regulatory Status
EU EU Status
prohibited
US US Status
permitted
US Notes
Permitted — not restricted under 21 CFR
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Dimethyl-3-methylpentadienyl-oxirane.
Calculate MoS for your specific formulation with the MoS Calculator.
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 |
|---|---|---|---|---|---|
| HRIPT | - | 0 | - | - | - |
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
1 - 10 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Fragrance
Regulatory List Membership (2)
IFRA Fragrance Transparency List
EPA Safer Chemical Ingredients List (SCIL)
Expert Verdict
Expert safety assessment and concern-level summary for Dimethyl-3-methylpentadienyl-oxirane.
Regulatory Flags
potential-allergen
fragrance-component
epa_safer_alternative
ifra_fragrance
Known Synonyms
2,2-Dimethyl-3-(3-methyl-2,4-pentadienyl)oxirane
2,2-Dimethyl-3-(3-methyl-2,4-dimethyl-pentadienyl)oxirane
EINECS 273-870-4
6,7-Epoxy-3,7-dimethyl-1,3-octadiene
Chemical Function
Fragrance
Regulatory Lists
IFRA Transparency
SCIL (9/2019)
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Dimethyl-3-methylpentadienyl-oxirane allowed in the EU?
Dimethyl-3-methylpentadienyl-oxirane EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.
What does Dimethyl-3-methylpentadienyl-oxirane do in cosmetics?
Dimethyl-3-methylpentadienyl-oxirane functions as: Fragrance (synonym: Myroxyde). It is classified as a cosmetic ingredient in our database. CAS number: 69103-20-4.
Is Dimethyl-3-methylpentadienyl-oxirane used outside cosmetics?
Dimethyl-3-methylpentadienyl-oxirane also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does Dimethyl-3-methylpentadienyl-oxirane have different safety status in cosmetics vs industrial chemicals?
Dimethyl-3-methylpentadienyl-oxirane is prohibited in EU cosmetics but has active industrial GHS classifications (H317).
Compliance Tools
Check Dimethyl-3-methylpentadienyl-oxirane 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
Isodecyl Acetate
Good
Chemical family
Fragrance ingredient, skin conditioni...
Isotridecyl Acetate
Excellent
Chemical family
Fragrance ingredient / emollient
DIMER AMIDE
Good
Browse nearby
Antimicrobial
Is Dimethyl-3-methylpentadienyl-oxirane 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 Dimethyl-3-methylpentadienyl-oxirane in your formulation.