thiophene

sulfurous sulfide

Found in 5 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C4H4S
Molecular weight: 84.14 g/mol
PubChem CID: 8030 — full record on PubChem

Properties

Odor description: garlic
Odor threshold — in a food matrix: 22.0 ppb 1 published value · see all 2 with sources
Volatility: high
CAS number: 110-02-1

Regulatory · United States

FEMA GRAS — Generally Recognized As Safe for flavoring use

? Partial match

FEMA number: 4836
GRAS publication: GRAS 28
CAS number: 137363-86-1
FEMA primary name: 10% solution of 3,4-dimethyl-2,3-dihydrothiophene-2-thiol

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	0.04	0.4
beverages, alcoholic	0.03	0.15
beverages, non-alcoholic	0.01	0.05
beverages, nonalcoholic	0.01	0.05
cheeses	0.01	1
chewing gum	0.03	0.3
condiments and relishes	0.01	1
confections and frostings	0.03	0.3
fats and oils	0.01	0.5
fruit ices	0.04	0.4
gelatins and puddings	0.03	0.3
gravies	0.01	1
hard candy	0.04	0.4
jams and jellies	0.04	0.4
meat products	0.01	1
poultry	0.01	1
processed vegetables	0.01	1
seasonings and flavors	0.01	1
snack foods	0.01	1
soft candy	0.04	0.4
soups	0.01	1

Source: FEMA GRAS publications 1-33. 8 related FEMA records for this name — verify the exact substance for regulatory use.

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.

In a food matrix

22.0 ppb

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

Threshold	Matrix	Source	Paper
22.0 ppb	water (food: unknown)	Literature corpus	30166567

In air

0.560 ppb

Airborne detection — not comparable to a water threshold.

Threshold	Matrix	Source	Paper
0.560 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 thiophene. 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 thiophene in it.

158 cmpds

270 cmpds

367 cmpds

443 cmpds