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Description and features

Enox DTBP (Di-tert-butyl peroxide) is a transparant liquid which has C8H18O2 as chemical formula.  This dialkyl peroxide is used as initiator for the production of Low Density Polyethylene (LDPE). Further it finds its application in the polymerization and copolymerization of styrene, olefins and acrylic resins and as modification agent of polypropylene degradation.

Di-tert-butyl peroxide is also known as DTBP, peroxide bis(1,1-dimethylethyl) and tert-Butyl peroxide.


Europe: Enox DTBP is ➔ on stock in our local warehouses. Our lead time is about one week if delivered in 20 KG PE drums.

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

This substance (CAS: 110-05-4) has been registered (FULL) under REACH (EC) 1907/2006.

Product Identification

CAS number 110-05-4
EC number 203-733-6
HS code 2909 60 00

Half-life data

Activation energy 35.1 kcal/mole
10 hr. half-life temp 126 °C
1 hr. half-life temp 149 °C
1 min. half-life temp 193 °C


Appearance light yellow transparent liquid
Assay ≥98.00 %
Colour ≤60
Fe ≤2 mg/kg
TBHP ≤0.60 %
Active oxygen content ≥10.72 %
Conductivity ≥1000 pS/m


Available packaging: 20 KG PE drum & 160 KG steel drums.
Special packaging is available on request


Store Di-tert-butyl peroxide in a cool, dry and well-ventilated area and in line with legal requirements.
Keep Enox DTBP away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for Enox DTBP and all other products supplied by Vesta Chemicals.

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 formula C8H18O2
Molecular weight 146.23 g/mol
Smiles notation CC(C)(C)OOC(C)(C)C
InChi 1S/C8H18O2/c1-7(2,3)9-10-8(4,5)6/h1-6H3
Structural formula 110-05-4

Physicochemical information

Density 0.793-0.803 (d20/4)
Flash point 6 °C @ 113 mBar
Melting point -18 °C
Partition coefficient (log Pow) 1.51
Refractivity1.385 – 1.392 (n20/D)
SADT 80 °C
Solubility in water Moderately soluble (100 mg/l)
Vapour pressure 29 mBar @ 25 °C