iso-butyl alcohol

floral alcohol Key food odorant

Found in 2 ingredients across the CompKitchen flavor graph.

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

Key food odorant (individualist)

Dunkel et al. 2014

Identified in the meta-analysis of 227 food samples as one of 151 individualist odorants — appears in <5% of foods, carries the diagnostic signature of specific ingredients. Characteristic odor: malty.

Source: Angew. Chem. Int. Ed. 2014, 53, 7124–7143

Properties

Odor threshold — orthonasal, in clean water: 1000 ppb – 19000 ppb median 7000 ppb · 3 published values · see all 14 with sources
CAS number: 78-83-1
Retention index: 1097

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

✓ Exact match

FEMA number: 2178
GRAS publication: GRAS 3
FEMA primary name: BUTYL ALCOHOL

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

Source: FEMA GRAS publications 1-33. 1 related FEMA record for this name — verify the exact substance for regulatory use.

Published thresholds

14 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

1000 ppb – 19000 ppb

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

Threshold	Matrix	Source	Paper
1000 ppb SIDA	water	Rychlik 1998 · 1 studies	—
7000 ppb	water_odor	Leffingwell	—
19000 ppb SIDA	water	Dunkel 2014	—

In a food matrix

7.8 ppb – 654 ppb

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

Threshold	Matrix	Source	Paper
3.5 ppb	water (food: wine)	Literature corpus	38846797, 40467248
Flagged: 156× from the median of this group. Excluded from the range above pending re-check against the source publication — shown rather than hidden.
7.8 ppb	water (food: rice)	Literature corpus	38846797, 40467248
550 ppb	water (food: reference standard (water))	Literature corpus	38846797, 40467248
621 ppb	water (food: unknown)	Literature corpus	38846797, 40467248
654 ppb	water (food: bread)	Literature corpus	38846797, 40467248

In air

11.0 ppb – 676 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
11.0 ppb	air	Nagata 2003	—
676 ppb	air (HS_hellman_small)	Cometto-Muñiz (PMC)	—

Other matrix

180 ppb – 10069 ppb

Measured in a non-aqueous medium (oil, starch, cellulose).

Threshold	Matrix	Source	Paper
180 ppb	wine matrix (12% ethanol) (food: rum / red wine)	Literature corpus	38846797, 40467248
500 ppb	wine (food: red wine (cabernet sauvignon))	Literature corpus	38846797, 40467248
10000 ppb	ethanol/water (food: rum / red wine)	Literature corpus	38846797, 40467248
10069 ppb	ethanol/water 40/60 (food: rum (aged))	Literature corpus	38846797, 40467248

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 iso-butyl alcohol. 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 iso-butyl alcohol in it.

167 cmpds

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