2,4-dihydroxybenzoic acid

sour acid

Found in 10 ingredients across the CompKitchen flavor graph.

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

2D Lewis Structure

Formula: C7H6O4
Molecular weight: 154.12 g/mol
PubChem CID: 1491 — full record on PubChem

Properties

Odor description: mild, phenolic
Odor threshold: 217788.89 ppb (1 source, non-SIDA)
Volatility: medium
CAS number: 89-86-1

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.

mild phenolic FlavorDB 2.0, Flavordb Odor Column 2 sources agree

mild, phenolic shown above 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.

Found in

Measured impact first, then profile share

Every ingredient known to contain 2,4-dihydroxybenzoic 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 2,4-dihydroxybenzoic acid in it.

220 cmpds

233 cmpds

278 cmpds

288 cmpds