gamma-Curcumene is a sesquiterpene hydrocarbon found repeatedly in immortelle, lantana, patchouli, and other aromatic plant profiles. The live evidence base is strongest for identity, repeated natural occurrence, and a defined biosynthetic pathway via gamma-curcumene synthase, while direct isolated-compound pharmacology remains limited. Archive-safe positioning is that gamma-curcumene is a chemistry-forward sesquiterpene marker with some oil-level antimicrobial context and clear gaps around constituent-specific human safety and efficacy.
Chemical identity and composition
PubChem lists gamma-curcumene as a C15H24 sesquiterpene hydrocarbon, and enzyme references define a dedicated gamma-curcumene synthase that cyclizes farnesyl diphosphate to gamma-curcumene in patchouli. Public CAS trails are inconsistent across sources: The Good Scents cites 28976-68-3 while one existing local oil record uses 29837-07-8, so this record leaves the CAS field null pending future reconciliation.
Aroma and practical use
- Use the recorded woody, spicy, herbal, warm, herbaceous descriptors to explore a blend's scent character; perceived strength also depends on the other ingredients.
- Review the flagged use concerns across every contributing oil and the selected dilution.
- 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.
patchouli biosynthesis research
A Europe PMC abstract for the patchouli sesquiterpene-synthase paper reported that one of the cloned cDNAs encoded a gamma-curcumene synthase, directly linking the constituent to a characterized plant terpene-synthase system.
Measured: identification of gamma-curcumene synthase
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
oil level antibacterial context
A PubMed-indexed lantana oil study reported gamma-curcumene at 7.50% among the major volatile constituents in an oil that was then screened for antibacterial activity, which is useful as mixture-level context but not isolated-compound proof.
Measured: major-constituent profile linked with antibacterial testing
This experimental finding does not establish benefit, dose or safety in people using this blend.
oil level antimicrobial context
A PubMed-indexed essential-oil study reported gamma-curcumene at 42.8% as the main component of one flower oil that showed antimicrobial activity, again supporting compositional relevance more than purified gamma-curcumene pharmacology.
Measured: major-constituent profile and antimicrobial activity
This experimental finding does not establish benefit, dose or safety in people using this blend.
Use concerns and concentration limits
Sensitization concernFlagged
Flagged in the constituent reference; assess the source, route and finished-product concentration.
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.
The Good Scents gamma-curcumene page lists the material under natural substances and extractives and marks it as not for fragrance use and not for flavor use, but without a fuller public toxicology dossier.
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.
No constituent-specific human clinical safety trials, dermal limits, or phototoxicity reviews for isolated gamma-curcumene were located 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 public CAS assignments are not fully consistent across accessible sources, future safety upgrades should confirm the preferred registry before linking in additional hazard data.
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
gamma curcumene synthase pathway
Enzyme references identify gamma-curcumene synthase as catalyzing conversion of farnesyl diphosphate to gamma-curcumene, supporting a defined sesquiterpene cyclization pathway in patchouli.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
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)
- The strongest biological evidence located in this pass is mostly oil-level and mixture-based rather than isolated-compound testing of purified gamma-curcumene.
- No human clinical or constituent-specific dermal safety literature was verified for isolated gamma-curcumene.
- Accessible CAS records conflict across sources, so the CAS field remains null until the archive chooses a preferred registry mapping.
- No IFRA Standard exists for gamma-curcumene, so no category-specific dermal maximum could be sourced; the previously recorded dermal_limit_pct:25 and sensitizing:true values were not corroborated by any primary source found in this pass and should be treated as unverified placeholders.
- 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.