Download Product Sheet

Description and features
Enox TMCH (1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane) is liquid substance which has C17H34O4 as chemical formula. It it used used for the (co)polymerization of styrene, acrylonitrile, acrylates and methacrylates in the temperature range between 90°C to 120 °C and for the polymerization of diethylene glycoldi(allycarbonate) based optical monomers. The use level of Iniper 29 will depend on the particular cure parameters being used.

1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane is also known as TMCH and 1,1-Bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane.

Product information

CAS number6731-36-8
EC number 229-782-3
HS code2909 60 00

Molecular and structural information

Molecular formulaC17H34O4
Molecular weight302.452 g/mol
Smiles notationO(OC(C)(C)C)C1(OOC(C)(C)C)C[C@@H](CC(C)(C)C1)C
Structural formula:6731-36-8


Enox TMCH-50Enox TMCH-75Enox TMCH-90
Assay49 - 51 %74 - 76 % 89 - 91 %
AppearanceClear liquidClear liquidClear liquid
Colour50 Pt-Co max50 Pt-Co max50 Pt-Co max
Density0.87 g/cm3 @ 20 °C
TBHP≤0.10 %≤0.10 %≤0.10 %
SolventIsododecane / mineral oil/ ethyl benzeneIsododecane/ mineral oil/ ethyl benzeneIsododecane/ mineral oil/ ethyl benzene

Half life data

Activation energy35.1 kcal/mole
10 hr. half-life temp92 °C
1 hr. half-life temp112 °C
1 min. half-life temp155 °C

Physicochemical information

Density0.910 g/cm3 @ 20 °C
Melting point-29 °C
Partition coefficient (log Pow)6.92 @ 20 °C
Solubility in waterInsoluble (< 0.1 mg/l)
Vapour pressure2 Pa @ 20 °C
Viscosity35.5 mPa.s @ 20°C.

Available packaging: 20 KG PE drums.
Special packaging is available on request

Shipment Info
Europe and United States: Provided Enox TMCH is on stock in our local warehouses our lead time is about one week if delivered in 20 KG drums.
Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

Store 1-1-Di-tert-butylperoxy-3-3-5-trimethylcyclohexane in a cool, dry and well-ventilated area and in line with legal requirements.
Keep Enox TMCH away from heat sources and oxidizing agents.

This substance (CAS: 6731-36-8) has been registered (FULL) under REACH (EC) 1907/2006.

A Material Safety Data Sheets (MSDS) is available for Enox TMCH and all other products supplied by Vesta Intracon BV. An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

1-1-Di-tert-butylperoxy-3-3-5-trimethylcyclohexane: Disclaimer. This information is supplied solely for informational purposes and Vesta Intracon bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.