Description and features

Enox 101-50D-pd (2-5-Dimethyl-2-5-di-tert-butylperoxy-hexane on silica, 50%) is a white powder which has C16H34O4 as chemical formula. It is used to for the crosslinking of natural rubber, synthetic rubber (such as silicone rubber)  and as modification agent of polypropylene degradation.

2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane is also known as di-tert-butyl 1,1,4,4-tetramethyltetramethylene diperoxide, 2,5-Dimethyl-2,5-bis(tert-butylhydroperoxy)hexane and Di-tert-butyl 1,1,4,4-tetramethyltetramethylene diperoxide.


Europe: Provided Enox 101-50D-PD is on stock in our local warehouses our lead time is about one week if delivered in 25 KG drums.

South America, South Africa and other markets can also be served, please contact our sales department for more details.

This substance (CAS: 78-63-7) has been registered under REACH (EC) 1907/2006.

Product Identification

CAS number78-63-7
EC number201-128-1
HS code2909 60 00


AppearanceWhite powder
Assay49.00 – 51.00 %
Active oxygen5.50 %
Density0.30 – 0.50 g/cm3


Available packaging: 25 KG PE drums.
Special packaging is available on request.


Store 2,5-Dimethyl-2,5-di-tert-butylperoxy-hexane on silica in a cool, dry and well-ventilated area and in line with legal requirements.
Keep Enox 101-50D-pd away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for Enox 101-50D-pd and all other products supplied by Vesta Chemicals 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.

Molecular and structural information

Molecular formulaC16H34O4
Molecular weight290.44 g/mol
Smiles notationCC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C
Structural formula

Physicochemical information

Bulk density450 kg/m3 @ 20 °C
Partition coefficient (log Pow)No data available
Melting pointDecomposes before melting
Solubility in waterInsoluble (< 0.1 mg/l)
Vapour pressure2 kPa @ 25°C