Seychellene is a patchouli-associated sesquiterpene hydrocarbon that functions mainly as an identity and composition marker in essential-oil analysis. The live evidence base is thin for constituent-specific human relevance: public sources support strong occurrence data in patchouli and related oils, a clear registry identity, and only a small, lower-confidence preclinical literature around cyclooxygenase-screening models. For AromaForge, the most accurate framing is that seychellene helps define patchouli-style aroma chemistry while remaining weakly characterized for standalone mechanism and safety.
Chemical identity and composition
PubChem lists seychellene as C15H24 with InChIKey QQWUXXGYAQMTAT-KLLKFSIISA-N and a tricyclic sesquiterpene hydrocarbon skeleton. In the local archive, patchouli oil directly quantifies seychellene at 6.84%, where it sits alongside alpha-bulnesene, alpha-guaiene, and patchoulol as a recognizable patchouli marker.
Aroma and practical use
- Use the recorded woody, earthy, patchouli-like, dry 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 2012 patchouli oil evaluation paper listed seychellene among the other major compounds found in both lab and commercial patchouli oil samples, reinforcing its role as a composition marker.
A 2012 patchouli oil evaluation paper listed seychellene among the other major compounds found in both lab and commercial patchouli oil samples, reinforcing its role as a composition marker.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
A 2017 aroma-profile study of patchouli identified seychellene among the structurally confirmed constituents that change with fermentation and extraction conditions.
A 2017 aroma-profile study of patchouli identified seychellene among the structurally confirmed constituents that change with fermentation and extraction conditions.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
A 2015 in-vitro and in-silico patchouli fraction study described seychellene as a candidate non-selective COX-1/COX-2 inhibitor in pre-osteoblast testing, but the accessible evidence is limited to snippets and downstream citations.
A 2015 in-vitro and in-silico patchouli fraction study described seychellene as a candidate non-selective COX-1/COX-2 inhibitor in pre-osteoblast testing, but the accessible evidence is limited to snippets and downstream citations.
This experimental finding does not establish benefit, dose or safety in people using this 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 flagged
Not flagged in the current model. This is not proof of absence or unrestricted safety.
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 constituent-specific IFRA standard, human safety study, or authoritative toxicology review for isolated seychellene was verified in the reviewed public sources.
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 direct activity literature is sparse and weakly accessible, copy should avoid implying validated anti-inflammatory or antioxidant effects for purified seychellene.
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
putative nonselective cox binding
A 2015 patchouli-fraction paper described seychellene as a candidate non-selective cyclooxygenase inhibitor based on pre-osteoblast cell testing plus docking analysis, but this mechanism has not been independently verified in stronger public sources.
This experimental finding does not establish benefit, dose or safety in people using this 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 (6)
- No human clinical studies specific to isolated seychellene were located.
- Constituent-specific bioactivity evidence is sparse and depends heavily on one older low-access COX-screening paper.
- No standalone dermal, inhalation, or sensitization assessment was verified for isolated seychellene.
- No IFRA, RIFM, Tisserand & Young, or EU Annex III dermal limit or sensitization determination was found for seychellene 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.
- 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.