Agent Name


CAS Number




Major Category

Other Classes


(1,1,4,4-Tetramethyltetramethylene)bis(tert-butyl peroxide); 2,5-Bis(tert-butyldioxy)-2,5-dimethylhexane; 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane; 2,5-Dimethyl-2,5-bis(tert-butyldioxy)hexane; 2,5-Dimethyl-2,5-bis(tert-butylhydroperoxy)hexane; 2,5-Dimethyl-2,5-bis(tert-butylperoxy)hexane; 2,5-Dimethyl-2,5-di(t-butylperoxy)hexane; 2,5-Dimethyl-2,5-di-(tert-butylperoxy)hexane; AD; AD 40C; CR 05; CT 8 (crosslinking agent); HC 4 (peroxide); Hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)-; Interox DHBP; Interox DHBP 45IC/G; Kayahexa AD; Kayahexa AD 40; Kayahexa AD 40C; Luperco 101X45; Luperco 101XL; Luperox 101; Lupersol 101; Lupersol 101XL; Perhexa 2.5B; Perhexa 2.5B40; Perhexa 3M40; Peroxide, (1,1,4,4-tetramethyltetramethylene)bis(tert-butyl; RC 4 (peroxide); TC 8 (catalyst); Trigonox 101; Trigonox 101-101/45; Trigonox XQ 8; Triqanox XQ 8; Varox; Varox 50; Varox DBPH 50; Varox Liquid; Di-tert-butyl 1,1,4,4-tetramethyltetramethylene diperoxide; Hexane, 2,5-dimethyl-2,5-di(t-butylperoxy)-; Peroxide, (1,1,4,4-tetramethyl-1,4-butanediyl)bis((1,1-dimethylethyl); Peroxide, 1,1'-(1,1,4,4-tetramethyl-1,4-butanediyl)bis(2-(1,1-dimethylethyl); [ChemIDplus] DBHP; [ToxPlanet: EPA - TSCATS] DMHBP; [ToxPlanet: Government of Canada: Screening Assessment] UN3105


Peroxides, Organic


Clear yellow liquid; [CAMEO] Liquid; [Sigma-Aldrich MSDS]


Used to vulcanize or cross-link elastomers and polyolefins; [ToxPlanet: EPA - TSCATS] Used as a polymer additive, crosslinking agent, for curing resins, and to make belting, rubber and plastic hose, other rubber products, and plastics; [ToxPlanet: Government of Canada: Screening Assessment]


Increased liver weights with corresponding hepatocellular hypertrophy observed in 7-day oral study of rats; [ToxPlanet: EPA - TSCATS] A strong oxidizing agent that can ignite combustible materials; May explode if heated or contaminated; [CAMEO] A skin and eye irritant; [NTP] May explode from shock, friction, or heat; A skin irritant; [ToxPlanet: ECHA REACH Registrations] An unstable oxidizer that may cause fire; An irritant; [Sigma-Aldrich MSDS] See "1,4-Bis(alpha-(t-butyldioxy)isopropyl)benzene," "Di-tert-butyl peroxide," and "Methyl ethyl ketone peroxide."

Exposure Assessment
Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Organic peroxide, type D, liquid."

Adverse Effects

Hepatotoxin, Secondary

Links to Other NLM Databases
Toxicity Information


Chemical Information

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Related Information in HazMap

Industrial Processes with risk of exposure: