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Compound sheet

Molecule · pyrazine

2-methyl-5-ethylpyrazine

Found in 2 ingredients. 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
122.17 g/mol
CAS
13360-64-0
PubChem
—
Threshold · water
100 ppb
Class
pyrazine
Status
—

01How little it takes

  • in waterpapers disagree 16
  • in a foodpapers disagree 25.2
  • in oil 320

ppb, log scale · tick = median of published values, bar = full range, from open-access paper tables (not reviewed)

02Where it turns up

  • Drinks2

of the 2 ingredients that contain it, by food group

03What it travels with

Too few ingredients to say what it travels with.

What does 2-methyl-5-ethylpyrazine smell like?

We hold no odour description for 2-methyl-5-ethylpyrazine.

Which foods contain 2-methyl-5-ethylpyrazine?

We list 2 ingredients 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, you can smell it.

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 2-methyl-5-ethylpyrazine in it. ✓n = sources that recorded the link.

How strong is 2-methyl-5-ethylpyrazine?

Orthonasal, in clean water: 100 ppb, from 1 published value. Thresholds printed in paper tables for oil are about 20× the ones for water.

Published thresholds

1 measured value 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.

Orthonasal, in clean water · 100 ppb ppbThe reference measurement — smelled in water. OAV is computed against this.
ThresholdMatrixSourcePaper
100 ppb water_odor Leffingwell —

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

MediumMedianRangeValuesPapersPapers agree?
air 36 µg/L air 0.036–1e+03 77 no (3.9 decades)
food matrix 25.16 ppb 0.016–320 87 no (3.8 decades)
oil 320 ppb 50–1e+03 44 yes
unstated 16 ppb 0.4–1e+03 2217 yes
water 16 ppb 0.04–1e+03 2020 no (3.9 decades)

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 2-methyl-5-ethylpyrazine 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.

2-methyl-5-ethylpyrazine questions

Which foods contain 2-methyl-5-ethylpyrazine?

We list 2 ingredients that contain 2-methyl-5-ethylpyrazine.

How strong is 2-methyl-5-ethylpyrazine?

The median of 1 published odour thresholds in water is 100 ppb. Published values in oil are about 20 times higher than in water.

Look up another compound — search by name, CAS number, PubChem CID, or FEMA #.

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Cite this analysis
Plain text
Compound Kitchen (2026). 2-methyl-5-ethylpyrazine compound data sheet. https://compkitchen.com/compound/2-methyl-5-ethylpyrazine. Accessed 2026-11-03.
BibTeX
@misc{compkitchen_compound_2_methyl_5_ethylpyrazine_compound_data_sheet_2026,
  title  = {2-methyl-5-ethylpyrazine compound data sheet},
  author = {{Compound Kitchen}},
  year   = {2026},
  url    = {https://compkitchen.com/compound/2-methyl-5-ethylpyrazine},
  note   = {Accessed: 2026-11-03}
}

Methodology DOI: 10.5281/zenodo.19719459 · CC BY 4.0 · Citations are a request, not a requirement.