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4-methylnonanoic acid

sour acid

Found in 6 ingredients across the CompKitchen flavor graph.

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

2D Lewis structure of 4-methylnonanoic acid
2D Lewis Structure
Formula
C10H20O2
Molecular weight
172.26 g/mol
PubChem CID
62003 — full record on PubChem

Properties

Odor description
odorous
Odor threshold
2400.0 ppb (1 source, non-SIDA)
Volatility
medium
CAS number
45019-28-1
Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

✓ Exact match
FEMA number
3574
GRAS publication
GRAS 11
FEMA primary name
4-METHYLNONANOIC 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.

Also filed as
4-methyl-nonanoic acid

Same molecule, unified here — previously counted and displayed as separate compounds.

Found in

Measured impact first, then profile share

Every ingredient known to contain 4-methylnonanoic 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 4-methylnonanoic acid in it.

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Try the pairing tools to see which ingredient combinations rely on 4-methylnonanoic acid, or compare two ingredients side-by-side.