trans-Sabinene hydrate is a bicyclic monoterpene alcohol found in sweet marjoram and other herb, seed, and spice oils, where it can be a major chemotype marker rather than a trace constituent. The live evidence base is useful but mixed: identity and biosynthesis data are strong, flavor-use safety review exists through JECFA, and several newer studies describe antioxidant, antimicrobial, antibiofilm, or neurobehavioral findings in oils rich in trans-sabinene hydrate. Those activity findings remain mostly preclinical and mixture-level, so AromaForge copy should keep the chemistry and evidence qualifiers visible.
Chemical identity and composition
PubChem lists (+)-trans-Sabinene hydrate as C10H18O with InChIKey KXSDPILWMGFJMM-KXUCPTDWSA-N. JECFA and FAO flavoring records also list sabinene hydrate under the synonym 4-thujanol. In the local archive, trans-sabinene hydrate is prominent in marjoram (15.53%), while the broader sabinene-hydrate signal also appears in plai and other sabinene-hydrate-type profiles.
Aroma and practical use
- Use the recorded herbal, terpineol-like, cool, woody-spicy, herbaceous descriptors to explore a blend's scent character; perceived strength also depends on the other ingredients.
- Compare the recorded goal signals with the intended purpose, while keeping model assumptions separate from observed study outcomes.
- 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.
A 2012 mechanistic study identified two sabinene hydrate synthases responsible for the major monoterpene alcohols of the sabinene hydrate chemotype.
A 2012 mechanistic study identified two sabinene hydrate synthases responsible for the major monoterpene alcohols of the sabinene hydrate chemotype.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
A 2022 Nigella sativa seed-oil paper identified trans-sabinene hydrate at 9.90% and reported significant antioxidant, antibacterial, and antifungal activity for the whole oil.
A 2022 Nigella sativa seed-oil paper identified trans-sabinene hydrate at 9.90% and reported significant antioxidant, antibacterial, and antifungal activity for the whole oil.
This experimental finding does not establish benefit, dose or safety in people using this blend.
A 2025 zebrafish study reported marjoram oil with 36.11% trans-sabinene hydrate and found improved behavioral and oxidative-stress outcomes together with acetylcholinesterase inhibition at the whole-oil level.
A 2025 zebrafish study reported marjoram oil with 36.11% trans-sabinene hydrate and found improved behavioral and oxidative-stress outcomes together with acetylcholinesterase inhibition at the whole-oil level.
This experimental finding does not establish benefit, dose or safety in people using this blend.
How it contributes to goal calculations
Model markers guide the formulation score. They are separate from the source findings above.
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.
A recorded constituent reference, not a recommended oil dilution. Product category, source applicability and all contributing oils must be checked before use.
unverified reference · No source provenance attachedWHO/JECFA lists sabinene hydrate as having no safety concern at current levels of intake when used as a flavoring agent, which is a food-use assessment rather than a broad therapeutic safety endorsement.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
No direct public citation is attached to this entry.
No constituent-specific public dermal limit or robust human aromatherapy safety dataset for isolated trans-sabinene hydrate was verified in this pass.
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
sabinene hydrate synthase biosynthesis
Plant biosynthesis work identifies sabinene hydrate synthases as the enzymes responsible for formation of cis- and trans-sabinene hydrate chemotypes.
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.
jachfa flavor use safety pathway
JECFA evaluated sabinene hydrate as a flavoring substance and concluded there was no safety concern at current levels of intake in that food-use context.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
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 (5)
- Most accessible activity studies involve trans-sabinene-hydrate-rich oils rather than isolated trans-sabinene hydrate tested alone.
- Public human efficacy data were not located in this pass.
- There is recurrent cis/trans naming confusion around sabinene hydrate in trade and literature, so constituent identity should stay explicitly qualified.
- The numeric dermal reference lacks source provenance; a verified flag alone is insufficient.
- Some findings do not record an explicit exposure route; consult the linked study before applying them to a use.