m-Cymene is the meta-substituted aromatic cymene isomer, a minor volatile hydrocarbon that appears in selected plant-oil analyses and analytical references within the AromaForge archive. The live evidence base is strongest for identity, occurrence, and a small insecticidal or repellent literature on the isolated isomer rather than for fragrance therapy or human wellness use. Because its standalone biological evidence is narrow and mostly non-human, the safest archive positioning is chemistry-first with careful labeling of occurrence data, early pest-bioactivity findings, and unresolved gaps around broader human-use relevance.
Chemical identity and composition
PubChem identifies m-cymene as C10H14 with IUPAC name 1-methyl-3-propan-2-ylbenzene. Unlike the better-known para isomer p-cymene, this meta isomer has a much thinner bioactivity literature and is usually encountered as a minor analytical constituent. In the archive, the current tangerine record quantifies m-cymene at 1.495%, and external review snippets also report it in Alpinia zerumbet organ oils and in some other volatile profiles.
Aroma and practical use
- Use the recorded solvent-like, terpenic, mildly woody, 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.
The archive's current tangerine profile quantifies m-cymene at 1.495%, confirming that the constituent is at least occasionally relevant enough to be reported individually in citrus-peel distillate analyses.
The archive's current tangerine profile quantifies m-cymene at 1.495%, confirming that the constituent is at least occasionally relevant enough to be reported individually in citrus-peel distillate analyses.
This reference does not establish a therapeutic result or a safe use level for a custom oil blend.
A 2021 Alpinia zerumbet cymene-isomer study reported that m-cymene and o-cymene showed inverse organ distribution patterns, with m-cymene relatively richer in stems, flowers, and fruits, and that o-cymene showed stronger fumigant and contact toxicity than m-cymene.
A 2021 Alpinia zerumbet cymene-isomer study reported that m-cymene and o-cymene showed inverse organ distribution patterns, with m-cymene relatively richer in stems, flowers, and fruits, and that o-cymene showed stronger fumigant and contact toxicity than m-cymene.
This experimental finding does not establish benefit, dose or safety in people using this blend.
PubChem notes that m-cymene may be present as a mixture component of natural product plant oils, which supports cautious occurrence claims even though constituent-level natural-occurrence coverage is not as mature as for p-cymene.
PubChem notes that m-cymene may be present as a mixture component of natural product plant oils, which supports cautious occurrence claims even though constituent-level natural-occurrence coverage is not as mature as for p-cymene.
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.
Supplier-facing chemical safety listings consistently classify m-cymene as a flammable liquid, so formulation and storage context should treat it as a volatile hydrocarbon rather than a benign food-style lipid.
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.
This pass did not verify a modern constituent-specific fragrance-safety monograph or a robust human topical-use literature base for isolated m-cymene.
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
fumigant and contact toxicity to storage pests
A cymene-isomer study reported fumigant and contact toxicity for m-cymene against storage-pest insects, implying a general hydrocarbon volatile mode of pest disruption rather than a validated human-use mechanism.
This experimental finding does not establish benefit, dose or safety in people using this 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 (6)
- Direct human-use evidence for isolated m-cymene was not verified in this pass.
- The constituent literature is sparse and easily confounded with the better-studied p-cymene isomer, so copy should avoid borrowing p-cymene pharmacology.
- Modern fragrance-safety or dermal-tolerability assessments specific to m-cymene were not clearly located.
- 2026-07-13 dermal-safety pass: no RIFM/IFRA/Tisserand monograph specific to m-cymene (CAS 535-77-3) was found; the previous placeholder dermal_limit_pct of 0.1 had no supporting citation and was cleared to null. Sensitizing and penetration-enhancer status remain unresolved (no source located).
- 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.