undecanoic acid

sour acid

Found in 94 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C11H22O2
Molecular weight: 186.29 g/mol
PubChem CID: 8180 — full record on PubChem

Properties

Odor description: waxy, creamy, cheesy, fatty, coconut
Odor threshold — orthonasal, in clean water: 10000 ppb 1 published value · see all 2 with sources
Volatility: medium
CAS number: 112-37-8
Retention index: 1482

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

✓ Exact match

FEMA number: 3245
GRAS publication: GRAS 4
FEMA primary name: UNDECANOIC ACID

Use-level matrix not extracted for this substance — check the source publication for current ppm guidance.

Source: FEMA GRAS publications 1-33.

How this molecule is described

Sources disagree about odour more often than they disagree about chemistry. Rather than show one answer, here is every description on file with how many ingredient records carry it.

Descriptions on file

Ordered by how many independent descriptor streams give each wording, then by how often it appears. The bar is still replication — one source copied onto many ingredients scores high there — so the two can disagree.

oil Flavornet Cas

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cheese, coconut, creamy, fatty, oil, waxy FlavorDB 2.0

Waxy, creamy, cheese-like with a fatty dairy mouthfeel FlavorDB 2.0

camphor, chemical, citrus, peach, fatty, pungent, coconut FlavorDB 2.0

waxy, creamy, cheesy, fatty, coconut shown above Llm Adjudicated

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chemical Flavordb Odor Column

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Bars are the share of ingredient records carrying each description. High agreement means the sources replicate each other — not necessarily that they are right.

Published thresholds

2 measured values from the literature. Grouped by what was actually measured — a threshold smelled in clean water, tasted in the mouth, or measured in a real food are three different quantities and are not pooled.

Orthonasal, in clean water

10000 ppb

The reference measurement — smelled in water. OAV is computed against this.

Threshold	Matrix	Source	Paper
10000 ppb	water_odor	Leffingwell	—

In a food matrix

40.0 ppb

Measured in a real food, where the matrix shifts detection — not a clean-water value.

Threshold	Matrix	Source	Paper
40.0 ppb SIDA	water (food: unknown)	Literature corpus	32625638, 25857434, 29575869

Only values we can attribute are listed. Where a compendium's licence does not permit public attribution its figures are omitted here, so every number on this page traces to a citable source.

Found in

Measured impact first, then profile share

Every ingredient known to contain undecanoic acid. Ingredients with a measured concentration come first, ranked by odour activity; the rest follow by how large a share of that ingredient's profile this molecule is. The figure beside each is how many different compounds that ingredient has in total — not the concentration of undecanoic acid in it.

mandarin orange peel oil

18 cmpds

29 cmpds

33 cmpds

35 cmpds