Agent Name

Peroxybenzoic acid, t-butyl ester

Alternative Name

tert-Butyl peroxybenzoate

CAS Number

614-45-9

Formula

C11-H14-O3

Major Category

Plastics & Rubber

Synonyms

tert-Butyl peroxybenzoate; Benzenecarboperoxoic acid, 1,1-dimethylethyl ester; Benzoyl tert-butyl peroxide; Chaloxyd TBPB; Esperox 10; Novox; Perbenzoate de butyle tertiaire [French]; Perbenzoic acid, tert-butyl ester; Perbutyl Z; Peroxybenzoic acid, tert-butyl ester; Trigonox C; t-Butyl perbenzoate; t-Butyl peroxy benzoate; terc.Butylester kyseliny peroxybenzoove [Czech]; terc.Butylperbenzoan [Czech]; tert-Butyl perbenzoate; tert-Butyl peroxy benzoate; [ChemIDplus] UN3103

Category

Curing Agents (Aromatic)

Description

Colorless liquid; mp = 8.5 deg C; [Hawley] Colorless to slightly yellow liquid; mp = 8 deg C; [HSDB]

Sources/Uses

Used as polymerization initiator (polyethylene, polystyrene, polyacrylates, and polyesters) and curing agent (unsaturated polyesters and silicon rubber); Also used as a chemical intermediate; [HSDB]

Comments

An oxidizer; [Hawley] A strong oxidizer; Explosive; Fire and explosion hazard on contact with organic materials; [CAMEO] In animal experiments, effects included somnolence and seizures after inhalation and liver changes after ingestion; [RTECS] Injection into chicken eggs caused a small increase in embryo malformations; [REPROTOX] Oxidizer that can cause fire on contact with combustible substances; An irritant; [MSDSonline]

Exposure Assessment
Lethal Concentration

LC (rat) > 57 mg/m3/4h

Explanatory Notes

VP = 0.33 mm Hg at 50 deg C; [ChemIDplus] The Guide in the Emergency Response Guidebook is for "Organic peroxide type C, liquid."

Adverse Effects
Neurotoxin

Other CNS Neurotoxin

Hepatotoxin

Hepatotoxin, Secondary

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: