At a Glance
Material Family
Specialty Additives
Record Type
Compound
Primary Role
Crosslinking / Curing · Synthesis Intermediate
Functional Roles
Industries Served
Applications & Use Cases
- ▸ Free-radical crosslinking initiator for peroxide-cured EPDM, EPM, silicone, and other saturated elastomers where sulfur cure is unsuitable, producing heat- and compression-set-resistant networks.
- ▸ High-temperature crosslinking agent for polyethylene (PE) and ethylene-vinyl-acetate (EVA), including wire-and-cable insulation, foams, and rotomolded parts, owing to its relatively high decomposition temperature and long half-life.
- ▸ Controlled visbreaking/degradation (rheology modification) of polypropylene to produce controlled-rheology (CR-PP) resins with narrowed molecular-weight distribution for fiber and thin-wall molding grades.
- ▸ Initiator and curing catalyst for unsaturated polyester and vinyl-ester thermoset resins in pultrusion, SMC/BMC, and high-temperature composite molding.
- ▸ Grafting agent for functionalizing polyolefins (e.g., maleic-anhydride grafting) to make coupling agents and compatibilizers for filled and blended compounds.
Physical Properties
physical_form
Clear colorless to pale-yellow liquid (also supplied as ~40-50% powder/masterbatch blends on inert carrier)
molecular_weight
290.44 g/mol
assay_active_oxygen
~10.9% theoretical active oxygen (neat)
density
approx. 0.87 g/cm3 at 20 C (typical)
boiling_point
Decomposes before boiling
flash_point
approx. 60-67 C (closed cup, typical)
ten_hour_half_life_temperature
approx. 118 C (typical, in solution)
one_minute_half_life_temperature
approx. 180 C (typical)
water_solubility
Practically insoluble in water; soluble in common hydrocarbons and esters
Safety & Handling
Full SDS available on request
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →
Chemical Identity
CAS Number
78-63-7
Molecular Formula
C16H34O4
Molecular Weight
290.44 g/mol
IUPAC Name
2,5-bis(tert-butylperoxy)-2,5-dimethylhexane
PubChem CID
InChI Key
DMWVYCCGCQPJEA-UHFFFAOYSA-N
Synonyms & Trade Names
Related Products
Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.