Z-5-Nonadecene is a long-chain unsaturated hydrocarbon that appears in rose oils and other plant or natural-product GC profiles more often as a compositional marker than as a character-impact aroma chemical. The live evidence base is limited but usable for identity and occurrence: PubChem supports the exact Z-5 isomer assignment, while accessible rose-oil studies show that this constituent can be minor in some Damask rose samples and relatively prominent in specific ecotypes. Direct constituent-specific mechanism, toxicology, and human-use literature are weak, so this record should stay chemistry-first and gap-forward.
Chemical identity and composition
PubChem lists Z-5-Nonadecene as CID 5364560 with formula C19H38, InChIKey LHPVEDYVSCTZAY-LUAWRHEFSA-N, and IUPAC name (Z)-nonadec-5-ene. Unlike more common rose-oil nonadecene records that are written generically or as 1-nonadecene or 9-nonadecene, this file is restricted to the specific Z-5 isomer. Public registry coverage is thinner than for mainstream fragrance constituents, and no authoritative NIST page for the exact isomer was verified during this pass.
Aroma and practical use
- Use the recorded waxy, fatty, faint-hydrocarbon 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 Damask rose ecotype study reported one LN ecotype with Z-5-Nonadecene at 10.34%, showing that the constituent can become a major hydrocarbon marker in specific rose chemotypes rather than appearing only at trace levels.
A 2021 Damask rose ecotype study reported one LN ecotype with Z-5-Nonadecene at 10.34%, showing that the constituent can become a major hydrocarbon marker in specific rose chemotypes rather than appearing only at trace levels.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
A 2024 open-access Rosa x damascena essential-oil paper reported Z-5-Nonadecene at 0.12% in the tested oil, supporting its continued appearance in modern rose-oil analytical profiles even when it is not dominant.
A 2024 open-access Rosa x damascena essential-oil paper reported Z-5-Nonadecene at 0.12% in the tested oil, supporting its continued appearance in modern rose-oil analytical profiles even when it is not dominant.
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 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 tolerance study, or public fragrance-use monograph for isolated Z-5-Nonadecene 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.
Because the accessible evidence is mainly occurrence-focused, consumer-facing copy should not imply specific physiological benefits for the isolated constituent.
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 strong isolated mechanism located
The reviewed live sources did not yield a convincing constituent-specific mechanism paper for isolated Z-5-Nonadecene; nearly all usable evidence was compositional or analytical.
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 (5)
- No robust constituent-specific pharmacology, mechanism, or human safety literature for isolated Z-5-Nonadecene was verified in the reviewed public sources.
- An authoritative public CAS assignment was not confidently verified from the live sources used in this pass, so the CAS field is left blank rather than guessed.
- Most accessible evidence concerns occurrence in mixtures, especially rose oils, not standalone biological behavior.
- 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.