butyl isobutyrate

fruity ester

Found in 38 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C8H16O2
Molecular weight: 144.21 g/mol
PubChem CID: 7353 — full record on PubChem

Properties

Odor description: apple, banana, fruity, green, sweet, tropical
Odor threshold — orthonasal, in clean water: 80.0 ppb 1 published value · see all 3 with sources
Volatility: high
CAS number: 97-87-0
Retention index: 1131

Not in FEMA GRAS publications 1-33. Of 3,367 listed flavoring substances, none match this compound name. May still be food-safe under other regulatory routes (FDA 21 CFR 172, EFSA, JECFA) — check femaflavor.org for the authoritative current list.

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.

sweet fruity green tropical apple banana FlavorDB 2.0, Flavordb Odor Column 2 sources agree

apple, banana, fruity, green, sweet, tropical shown above FlavorDB 2.0

Sweet, fruity, apple, strawberry, banana, tutti frutti with a winey, blue cheesey nuance FlavorDB 2.0

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

3 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

80.0 ppb

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

Threshold	Matrix	Source	Paper
80.0 ppb	water_odor	Leffingwell	—

In a food matrix

812 ppb

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

Threshold	Matrix	Source	Paper
812 ppb	water (food: unknown)	Literature corpus	35496034

In air

22.0 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
22.0 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 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 butyl isobutyrate. 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 butyl isobutyrate in it.

109 cmpds

110 cmpds

110 cmpds

110 cmpds