Selina-4,11-diene is a sesquiterpene hydrocarbon that appears in the literature mainly as a compositional marker in sesquiterpene-rich essential oils and agarwood-related chemistry. In the AromaForge archive it appears in Bengali nagarmotha material, while Balkan immortelle notes also mention it as part of a regional profile. Public evidence is adequate for identity and occurrence, but constituent-specific mechanism and safety literature are sparse, so this record should stay conservative and explicitly gap-labeled.
Chemical identity and composition
NIST lists selina-4,11-diene with formula C15H24 and a dedicated structure record, while PubChem currently exposes a conflicting name match that returns a C16H28 structure for a similarly labeled entry. Because of that discrepancy, this record follows the NIST identity for the archive constituent and flags external registry ambiguity rather than implying all databases agree. Bengali nagarmotha in the local archive lists selina-4,11-diene at 1.64%.
Aroma and practical use
- Use the recorded woody, dry, spicy, balsamic, terpenic descriptors to explore a blend's scent character; perceived strength also depends on the other ingredients.
- Read the route, preparation and experimental context before using a study finding to choose an oil.
Reported benefits and effects
Findings retain their study context. An animal or laboratory result describes that experiment.
A 2021 Plants paper identified selina-4,11-diene as 9.29% of Lannea egregia leaf essential oil, while antimicrobial testing was performed on the whole oil rather than on isolated selina-4,11-diene.
The abstract reports minimum inhibitory concentrations for the complete essential oils against bacteria and fungi, which supports occurrence data but not a constituent-specific antimicrobial claim.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
A 2025 Chinese materia medica paper isolated selina-4,11-diene-derived sesquiterpenoids from Aquilariae Lignum Resinatum, reinforcing that this skeleton appears in agarwood chemistry research.
The abstract describes structural elucidation of multiple sesquiterpenoids including selina-4,11-diene-derived compounds, which is useful for identity context but not for direct safety or efficacy claims.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
Use concerns and concentration limits
Sensitization concernNot flagged
Not flagged in the current model. This is not proof of absence or unrestricted safety.
Phototoxicity concernNot flagged
Not flagged in the current model. This is not proof of absence or unrestricted safety.
Oxidation concernNot assessed
Not assessed in the available record.
Penetration enhancementNot flagged
Not flagged in the current model. This is not proof of absence or unrestricted safety.
No numeric constituent-specific use limit is available here. Missing is not an unrestricted-use clearance.
No public constituent-specific toxicology review, dermal limit, or fragrance-panel safety assessment was located for isolated selina-4,11-diene.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
No direct public citation is attached to this entry.
Because the evidence base is mostly compositional, benefit or hazard interpretation should default to the parent oil context unless stronger isolated-compound data are found.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
No direct public citation is attached to this entry.
Constituents it may interact with
No constituent-pair interaction is recorded for this identity. The report does not assume either amplification or incompatibility.
How the effects were investigated
no isolated constituent-specific mechanism established in accessible sources
The located sources did not isolate selina-4,11-diene and demonstrate a specific molecular mechanism for it alone.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
No direct public citation is attached to this entry.
What this report cannot establish
- A reported constituent percentage does not establish an effective human therapeutic dose or the amount absorbed into the body.
- The presence of a constituent does not guarantee a clinical benefit, rash treatment or sleep improvement from a custom blend.
- An unflagged concern or missing use limit does not establish safety for ingestion, inhalation, skin exposure or a particular person.
- A candidate constituent interaction does not establish that two oils amplify one another at the selected proportions.
- Constituent descriptors alone do not establish a precise top, heart or base lifetime in a finished blend.
Known data gaps (7)
- Public registries disagree on structure handling for similarly named selina-4,11-diene records; this file follows the NIST C15H24 identity and flags the mismatch.
- No strong isolated-compound safety or mechanism literature was located.
- The repository already contains a differently named near-duplicate record, `data/constituents/4_11_selinadiene.json`, but this batch did not modify it because it falls outside the assigned file scope.
- No IFRA, RIFM, Tisserand & Young, or EU Annex III dermal limit or sensitization determination was found for selina-4,11-diene as of 2026-07-13 verification pass; the previous dermal_limit_pct value of 25 and sensitizing:true had no locatable citation and were corrected to null/false.
- Second-pass 2026-07-13 web search targeting CAS 28290-20-2 directly (ECHA C&L, RIFM by CAS) again returned no selina-4,11-diene-specific safety assessment; only identity records (Pherobase, Chemsrc, Good Scents, ChemSpider, NIST, PubChem) surfaced, with the pre-existing PubChem structure-mismatch issue reconfirmed. Negative result confirmed via a distinct search angle from the first pass; no further correction made.
- No constituent-specific numeric dermal reference is available here.
- Some findings do not record an explicit exposure route; consult the linked study before applying them to a use.