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2-nonenoic acid

sour acid

Found in 7 ingredients across the CompKitchen flavor graph.

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

2D Lewis structure of 2-nonenoic acid
2D Lewis Structure
Formula
C9H16O2
Molecular weight
156.22 g/mol
PubChem CID
97730 — full record on PubChem

Properties

Odor description
fatty oily
Volatility
medium
CAS number
3760-11-0
Retention index
1310
Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

~ Likely match
FEMA number
4188
GRAS publication
GRAS 22
FEMA primary name
2-Nonenoic acid gamma-lactone

Reported use levels (ppm by food category)

Typical vs maximum reported addition levels in finished food. Use as a regulatory ceiling reference — verify against the current GRAS publication for your product category.

Food category Typical (ppm) Maximum (ppm)
baked goods 10 30
beverages (alcoholic) 5 10
beverages (nonalcoholic) 2 5
breakfast cereal 10 20
cheese 10 20
chewing gum 20 50
confectionery frostings 5 10
frozen dairy 5 10
fruit ices 10 20
gelatins/ puddings 5 10
hard candy 10 20
jams/jellies 5 10
milk products 5 20
processed fruits 5 10
snack foods 5 10
soft candy 10 20
soups 5 10
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.

fatty oily shown above FlavorDB 2.0, Flavordb Odor Column 2 sources agree
6
fatty FlavorDB 2.0
1

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

Found in

Measured impact first, then profile share

Every ingredient known to contain 2-nonenoic 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 2-nonenoic acid in it.

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