Carotol is the signature sesquiterpene alcohol of carrot seed essential oil and one of the main constituents that gives carrot-seed materials their dry earthy woody identity. The public evidence base is much thinner than for high-profile phenols or oxides: identity and occurrence in carrot seed oil are strong, while the most accessible constituent-specific bioactivity work centers on antifungal screening and a few later cytotoxicity or derivative studies. Archive copy should therefore present carotol primarily as a carrot-seed chemotype marker with early-stage antimicrobial research and explicit toxicology and human-evidence gaps.
Chemical identity and composition
PubChem identifies carotol as C15H26O with a daucane/carotane-type sesquiterpene alcohol structure. Within the archive it is not a trace constituent: the general carrot-seed record lists 66.78% carotol in a cultivated Turkish sample, while a French carrot-seed essential-oil batch lists 34.1%, confirming carotol-rich chemotypes rather than only minor occurrence.
Aroma and practical use
- Use the recorded earthy, dry, woody, rooty, carrot-like 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 2004 antifungal paper on carrot seed oil and isolated sesquiterpenes reported carotol as the strongest tested constituent against Alternaria alternata, inhibiting radial fungal growth by 65% in the reported assay.
The abstract directly identifies carotol, compared with daucol and beta-caryophyllene, as the strongest antifungal constituent in that carrot-seed test system.
This experimental finding does not establish benefit, dose or safety in people using this blend.
A 2019 structure-activity paper reported that carrot seed methanol extract and isolated carotol showed strong in vitro antifungal potential against three rice phytopathogens, with activity varying by dose and polarity-related structural changes.
The Europe PMC abstract states that carotol compared favorably with other tested components and that more polar derivatives showed stronger antifungal behavior than non-polar moieties.
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 robust public constituent-specific dermal-limit standard or human safety dossier for isolated carotol 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.
The current evidence base is dominated by in vitro antifungal and occurrence literature, so carotol should not be described with treatment-style claims.
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
fungal growth inhibition in vitro
Accessible studies support a functional antifungal effect for carotol in poisoned-food and radial-growth assays, but they do not yet establish a detailed molecular target or a validated human-use mechanism.
This experimental finding does not establish benefit, dose or safety in people using this 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)
- Public constituent-specific toxicology for isolated carotol is sparse compared with the occurrence literature.
- This pass did not verify a human clinical study on isolated carotol.
- Most accessible activity data are agricultural or in vitro antifungal assays rather than topical or systemic human-use research.
- A c6 verification search (2026-07-13) found no RIFM/IFRA safety assessment or dermal-limit citation for carotol (CAS 465-28-1) despite its major role in carrot seed oil; the prior unsourced 20% dermal_limit_pct and sensitizing:true were corrected to null.
- 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.