Aroma molecule · terpenoid
6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane
Smells ofnutty, herbal, green
Found in 1 ingredient. We hold no measured concentration for it in any of them yet, so we cannot say where it is strong enough to smell.
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- Formula
- —
- Mass
- 136.23 g/mol
- CAS
- 127-91-3
- PubChem
- —
- FEMA
- not listed
- Threshold · working value
- 140 ppb
- Class
- terpenoid
- Status
- Key food odorant
01How little it takes
- in water 140
- in air 33
ppb, log scale · tick = median of published values, bar = full range
02Where it turns up
- Fruit1
of the 1 ingredient that contain it, by food group
03What it travels with
Too few ingredients to say what it travels with.
What does 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane smell like?
Sources describe it as nutty, herbal, green.
It is a key food odorant (individualist): identified in the meta-analysis of 227 food samples as one of 151 individualist odorants, which appear in under 5% of foods and carry the signature of specific ingredients. Source: Dunkel et al. 2014, Angew. Chem. Int. Ed. 53, 7124–7143
Which foods contain 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane?
We list 1 ingredient that contain it, but presence is not the same as smell. What matters is how much is there compared with how little it takes to notice it. That ratio is the odour activity value (OAV). Above 1 suggests it may be noticeable; it is a screening indicator, not a guarantee.
Found in
Measured foods first, then real food profiles, then thin or composite records (marked). The figure beside each is how many compounds that ingredient has in total, not the amount of 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane in it. ✓n = sources that recorded the link.
How strong is 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane?
Orthonasal, in clean water: 140 ppb, from 1 published value.
Published thresholds
2 measured values from the literature, grouped by what was measured: a threshold smelled in clean water, tasted, or measured in a real food are different quantities and are not pooled.
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 140 ppb | water_odor | Leffingwell | — |
| Threshold | Matrix | Source | Paper |
|---|---|---|---|
| 33.0 ppb | air | Nagata 2003 | — |
Only values we can attribute are listed. Where a compendium’s licence does not permit public attribution its figures are omitted, so every number here traces to a citable source.
Thresholds in published tables
| Medium | Median | Range | Values | Papers | Papers agree? |
|---|---|---|---|---|---|
| air | 2300 µg/L air | 440–4.16e+03 | 2 | 1 | one paper |
| unstated | 140 ppb | 140–140 | 1 | 1 | one paper |
Numbers printed in open-access papers, grouped by the medium the table states. Median and full range; “agree” means two or more papers whose middle 80% of values sit within 100×. Not reviewed.
Is 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane safe to eat?
Not in FEMA GRAS publications 1–33. Of 3,367 listed flavoring substances, none match this compound or its other names. It may still be food-safe under other regulatory routes (FDA 21 CFR 172, EFSA, JECFA); check femaflavor.org for the authoritative current list.
6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane questions
What does 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane smell like?
Sources describe 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane as nutty, herbal and green. It is one of the key food odorants identified by Dunkel et al. (2014).
Which foods contain 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane?
We list 1 ingredient that contain 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane.
How strong is 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane?
The median of 1 published odour thresholds in water is 140 ppb.
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Cite this analysis
CompKitchen (2026). 6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane compound data sheet. https://compkitchen.com/compound/6%2C6-dimethyl-2-methylidenebicyclo%5B3.1.1%5Dheptane. Accessed 2026-11-08.
@misc{compkitchen_compound_6_6_dimethyl_2_methylidenebicyclo_3_1_1_heptane_compound_data_sheet_2026,
title = {6,6-dimethyl-2-methylidenebicyclo[3.1.1]heptane compound data sheet},
author = {{CompKitchen}},
year = {2026},
url = {https://compkitchen.com/compound/6%2C6-dimethyl-2-methylidenebicyclo%5B3.1.1%5Dheptane},
note = {Accessed: 2026-11-08}
}
Methodology DOI: 10.5281/zenodo.19719458 · CC BY 4.0 · Citations are a request, not a requirement.