Is 2-Decenal safe in cosmetics?
2-Decenal has a safety rating of "MODERATE" in our database. EU status: prohibited. US status: permitted.
MODERATE
Cosmetic Ingredient
2-Decenal
Also known as: 2-Decen-1-al, Decenaldehyde, Decylenic aldehyde, EINECS 223-472-1, NSC 20747 (+4 more)
INCI: 2-DECENAL
2-Decenal (CAS 3913-71-1) is a cosmetic cosmetic ingredient functioning as Fragrance. 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.
Cross-Vertical Regulatory Divergence
2-Decenal is prohibited in EU cosmetics but has active industrial GHS classifications (H315, H319).
Source: Cosmetics: ingredients.eu status; Chemicals: ghs classifications.signal word/hazard statement code
Function
Fragrance
Editorial assessment
MODERATE
Preliminary editorial note — not a computed safety verdict.
Chemistry & Identifiers
IUPAC Name
(E)-dec-2-enal
InChIKey
MMFCJPPRCYDLLZ-CMDGGOBGSA-N
Regulatory Status
EU EU Status
prohibited
US US Status
permitted
US Notes
Permitted — no FDA restriction
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for 2-Decenal.
Calculate MoS for your specific formulation with the MoS Calculator.
Sensitization AOP Dashboard
Adverse Outcome Pathway data across 5 assays (DPRA, KeratinoSens, hCLAT, LLNA, NESIL) aggregated from public sources.
DPRA Cys %
94.9%
DPRA Lys %
9.7%
KeratinoSens IC50
37.765 µM
LLNA EC3
2.5%
NESIL
625 µg/cm²
LLNA: Moderate (1B)
GHS: 1B
Source: LLNA: Gerberick et al. (2005); DPRA: Urbisch et al. 2015 [DOI:10.1016/j.yrtph.2014.12.008]; KS: Urbisch et al. 2015 [DOI:10.1016/j.yrtph.2014.12.008]
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Flavouring and nutrient
Fragrance
Regulatory List Membership (3)
IFRA Fragrance Transparency List
FDA Substances Added to Food (EAFUS)
Consumer Product Chemical
Editorial summary
Preliminary editorial summary for 2-Decenal — not a computed safety verdict. See the sourced toxicological data above.
Regulatory Flags
potential-allergen
fragrance-component
ifra_fragrance
fda_food_additive
jecfa_safe
Known Synonyms
2-Decen-1-al
Decenaldehyde
Decylenic aldehyde
EINECS 223-472-1
NSC 20747
2-decenaldehyde
3-heptyl-acrolein
3-heptylacrolein
dec-2-enal
Chemical Function
Fragrance
Flavouring and nutrient
Regulatory Lists
IFRA Transparency
food_additive; Substances Added to Food (formerly EAFUS) (2/2019)
consumer_product
Europe
Australian Status
AICIS status: listed
Frequently Asked Questions
Is 2-Decenal allowed in the EU?
2-Decenal EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.
What does 2-Decenal do in cosmetics?
2-Decenal functions as: Fragrance. It is classified as a cosmetic ingredient in our database. CAS number: 3913-71-1.
Is 2-Decenal used outside cosmetics?
2-Decenal also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Does 2-Decenal have different safety status in cosmetics vs industrial chemicals?
2-Decenal is prohibited in EU cosmetics but has active industrial GHS classifications (H315, H319).
Compliance Tools
Check 2-Decenal 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
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