Decanal is a saturated C10 aldehyde that appears repeatedly in citrus peel oils as a low-percentage but odor-important top-note constituent. The strongest live evidence for AromaForge is identity, repeated occurrence in grapefruit, orange, and mandarin materials, plus a modern fragrance-safety assessment reporting no genotoxic concern and no expected phototoxicity or photoallergenicity at reviewed use conditions. Direct constituent-specific wellness evidence is limited and preclinical, so this record should stay focused on aroma character, occurrence, and safety-review data rather than therapeutic positioning.
Chemical identity and composition
NIST and PubChem identify decanal as C10H20O, a straight-chain fatty aldehyde also cataloged as aldehyde C-10. Within the archive it functions mainly as an odor-active minor constituent in citrus oils, where very small percentages can still contribute waxy-citrus lift.
Aroma and practical use
- Use the recorded citrus peel, waxy, orange-like, fatty, aldehydic 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 fragrance safety assessment concluded that decanal was not genotoxic under the reviewed data package.
The published assessment summary lists genotoxicity as not genotoxic and supports current declared fragrance uses.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
The same RIFM assessment reported a repeated-dose NOAEL of 60 mg/kg/day and a reproductive-toxicity NOAEL of 500 mg/kg/day, with no expected phototoxicity or photoallergenicity.
These endpoints are summarized in the human-health section of the RIFM PDF alongside exposure-based margin-of-exposure conclusions.
The source assessment applies to its specified exposure and preparation; this entry is not an unrestricted-use clearance.
A preclinical olfactory study reported that the aldehydes nonanal and decanal stimulated mouse pheochromocytoma cells and influenced olfactory-marker readouts in vitro.
The accessible search snippet frames decanal as one of the natural fragrant aldehydes tested for olfactory stimulation effects in a cell model.
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.
A recorded constituent reference, not a recommended oil dilution. Product category, source applicability and all contributing oils must be checked before use.
recorded reference · RIFM fragrance ingredient safety assessment, decanal, CAS Registry Number 112-31-2 (Api et al., 2025, Food Chem. Toxicol. 197:115203) - IFRA Category 5A/5B (leave-on body lotion/face moisturizer) maximum acceptable concentration derived from NESIL 3000 ug/cm2Public safety-review evidence is substantially stronger than public efficacy evidence for isolated decanal.
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 reported decanal was not expected to be phototoxic or photoallergenic at the reviewed use conditions.
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.
As a simple aldehyde, decanal should be described cautiously in consumer copy because aldehydes can be chemically reactive even when fragrance-safety assessments are favorable at current use levels.
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
odorant-receptor and olfactory cell stimulation
Preclinical olfactory work supports decanal acting as an odorant stimulus in neuronal or olfactory model systems, which fits its strong fragrance relevance but does not translate into a medical effect claim.
This experimental finding does not establish benefit, dose or safety in people using this blend.
reactive aldehyde chemistry with likely oxidation to decanoic acid
This is a chemistry-grounded inference rather than a decanal-specific metabolism paper from this research pass; straight-chain aldehydes commonly undergo oxidation to the corresponding acid.
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 (5)
- This research pass did not verify a strong isolated human clinical literature for decanal.
- The constituent-specific mechanistic literature accessible here is limited and mostly olfactory or cell-model oriented.
- No direct public IFRA dermal maximum specific to isolated decanal was verified in this pass.
- Worker c8 verification (2026-07-13): RIFM 2025 safety assessment located and reviewed (doi.org/10.1016/j.fct.2024.115203). Decanal itself was negative in a guinea pig maximization test (RIFM 1973) and in CNIH tests up to 3875 ug/cm2 (37 volunteers), but read-across material hexanal was DPRA-positive and LLNA EC3 45% (11250 ug/cm2), so decanal was assigned NESIL 3000 ug/cm2 and treated as a potential sensitizer for QRA purposes; sensitizing corrected from null (unsourced) to true. Not phototoxic/photoallergenic per UV/Vis spectra. Prior dermal_limit_pct:0.1 was unsourced and replaced with the IFRA Category 5A/5B leave-on MAC of 0.33% from the cited RIFM table.
- Some findings do not record an explicit exposure route; consult the linked study before applying them to a use.