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SHEET /m/tert-butylhydroquinone · PubChem CID 16043 · CAS 1948-33-0 · REV 2026.07

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Tert-Butylhydroquinone

from source

C10H14O2 · 166.22 g/mol

TBHQ · t-Butyl hydroquinone · MTBHQ · Sustane

What is Tert-Butylhydroquinone?

TBHQ, the antioxidant that keeps frying oil and instant noodles from going rancid. It is one of the most effective preservatives for fats. from source

CategoryFood & flavor
Chemical familyAromaticsPhenols
LeaderboardsBiggestDeadliest

Fig. 1 · 2D structure RDKit

SMILESCC(C)(C)C1=C(C=CC(=C1)O)O

The dose makes the poison inferred

A reported rat oral LD50 for Tert-Butylhydroquinone is 615 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:

43.0 g
a median lethal dose scaled to 154 lb (43,050 mg)

“The dose makes the poison” is a cross-species estimate shown as neutral science, not a threshold anyone should act on. Real toxicity depends on the person, not body mass alone.

Toxicity & hazards

Toxicity · LD50

615 mg/kg · low toxicity · LD50 rat oral from source

The dose lens above scales this to a body weight.

WarningIrritantEnvironmentalH302, H312, H315, H317, H319, H335, H400, H410from source

Keep roaming

Where Tert-Butylhydroquinone leads

Relatedcomputed
Butylated hydroxyanisole61% similarBoth carry a phenol group.Butylated hydroxytoluene41% similarBoth carry a phenol group.Bisphenol A38% similarBoth carry a phenol group.

Sources & methodology

PubChem CID
16043
Wikidata
Q662443
Structure
PubChem → RDKit
LD50
PubChem
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MoleculeFinder fingerprint similarity
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