Citronellyl formate is a rosy-green monoterpene ester strongly associated with geranium-style essential oils in the AromaForge archive. Compared with citronellol, its direct standalone pharmacology literature is sparse, but its identity, occurrence, and fragrance-safety profile are reasonably well documented. The strongest current public evidence comes from reference databases, geranium composition sources, and a RIFM safety assessment reporting no genotoxic concern, adequate margins of exposure for repeated-dose and reproductive endpoints, and no expected phototoxicity at reviewed use conditions.
Chemical identity and composition
PubChem identifies citronellyl formate as a C11H20O2 ester and notes natural occurrence in multiple organisms. In archive context it is most consistently a geranium marker ester, often accompanying citronellol, geraniol, and geranyl formate in rose-geranium chemistry.
Aroma and practical use
- Use the recorded rosy, green, fruity, waxy, citrus-floral, rose-like 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.
RIFM's 2021 safety assessment concluded that citronellyl formate was not genotoxic in the reviewed dataset.
The full-text summary states that citronellyl formate is not genotoxic and that the existing information supports its use as described in the assessment.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
The RIFM assessment reported a repeated-dose NOAEL of 66.7 mg/kg/day and a reproductive-toxicity NOAEL of 200 mg/kg/day.
The paper derives the repeated-dose NOAEL from an OECD 422 rat study and reports MOE values above 100 for the repeated-dose and reproductive endpoints.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
RIFM assigned citronellyl formate a read-across skin-sensitization NESIL of 6400 microg/cm2 and found it not expected to be phototoxic or photoallergenic.
The public assessment attributes the NESIL to citronellyl butyrate read-across and states that UV spectra do not support a phototoxic/photoallergenicity concern.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
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 attachedNo direct public constituent-specific wellness evidence was verified that would justify stronger benefit claims than the current safety-and-occurrence-weighted profile.
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.
RIFM's review found citronellyl formate not expected to be phototoxic or photoallergenic under the reviewed conditions of use.
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.
The reviewed public safety package relies partly on read-across for skin sensitization, so the record should keep that inference explicit rather than implying direct human patch data for this exact ester.
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.
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
likely ester hydrolysis to citronellol and formic acid
This is an inference from common ester metabolism rather than a direct mechanistic experiment on citronellyl formate.
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.
fragrance-safety assessment relies on exposure, read-across sensitization, and genotoxicity screening rather than target-specific pharmacology
The reviewed public literature supports a safety-assessment framework for this ingredient more clearly than a receptor or pathway pharmacology framework.
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)
- This pass did not verify a strong constituent-specific pharmacology literature for isolated citronellyl formate outside fragrance-safety assessment and occurrence studies.
- Mechanistic interpretation is mainly inferred from ester chemistry and RIFM risk-assessment logic rather than direct molecular-target studies.
- No standalone public primary IFRA dermal maximum specific to isolated citronellyl formate was verified in the reviewed sources.
- 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.