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Description and features
Iniper 201 (Di-tert-amyl peroxide) is a transparant liquid which has C10H22O2 as chemical formula. This dialkyl peroxide is mainly used as a radical initiator to induce polymerisation for the production of polypropylene (visbreaking), acrylic resins, ethylene, styrene and low density polyethylene (LDPE). Further it is used  in the production of wire and cables.

Di-tert-amyl peroxide is also known as di-tert-pentyl peroxide.

Product information

CAS number10508-09-5
EC number 234-042-8
HS code2909 60 00

Molecular and structural information

Molecular formulaC10H22O2
Molecular weight174.82 g/mol
Smiles notationC(OOC(CC)(C)C)(CC)(C)C
Structural formula:10508-09-5


AppearanceColorless liquid
Assay≥96 %
Active oxygen≤8.80 %
Color (Pt-Co APHA)≤50

Physicochemical information

Density0.808 g/cm3 @ 20 °C
Flash point29 °C @ 101.3 kPa
Melting point-55 °C
Partition coefficient (log Pow)4.729
SADT>75 °C
Solubility in waterSlightly soluble (13.83 mg/l)
Vapour pressure14.70 mbars @ 25 °C

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

Shipment Info
Europe and United States: Provided Iniper 201 (DTAP) 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 2,5-Dimethyl-2,5-di-tert-butylperoxy-hexane in a cool, dry and well-ventilated area and in line with legal requirements.
Keep Iniper 201 away from heat sources and oxidizing agents.

This substance (CAS: 10508-09-5) has been pre-registered under REACH (EC) 1907/2006.

A Material Safety Data Sheets (MSDS) is available for Iniper 201 (DTAP) 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.

Di-tert-amyl peroxide: 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.