Description

Di-tert-butyl peroxide (DTBP) (CAS 110-05-4) is a high-purity organic peroxide widely utilized as a radical initiator in polymerization reactions and industrial processes. With the molecular formula C₈H₁₈O₂ and IUPAC name 2-tert-butylperoxy-2-methylpropane, this compound is characterized by its stability, low volatility, and efficient decomposition at elevated temperatures (100–125°C). DTBP is supplied as a clear, colorless liquid with a faint odor, packaged under inert conditions to ensure maximum shelf life and safety. Suitable for use in academic research, pharmaceutical synthesis, and polymer manufacturing, it is rigorously tested for purity (typically ≥98%) and consistency. Store in a cool, dry place away from ignition sources and incompatible materials.

Properties

• CAS Number: 110-05-4
• Complexity: 80.8
• IUPAC Name: 2-tert-butylperoxy-2-methyl-propane
• InChI: InChI=1S/C8H18O2/c1-7(2,3)9-10-8(4,5)6/h1-6H3
• InChI Key: LSXWFXONGKSEMY-UHFFFAOYSA-N
• LogP: log Kow = 3.2 at 22 °C, pH 7.2
• Exact Mass: 146.130679813
• Molecular Formula: C8H18O2
• Molecular Weight: 146.23
• SMILES: CC(C)(C)OOC(C)(C)C
• Topological: 18.5
• Monoisotopic Mass: 146.130679813
• Physical Description: Di-tert-butyl peroxide is a clear colorless liquid.
• Color/Form: Clear, water-white liquid
• Boiling Point: 232 °F at 760 mmHg
• Melting Point: -40 °F
• Flash Point: 65 °F
• Solubility: less than 1 mg/mL at 70 °F
• Density: 0.704 at 68 °F – Less dense than water; will float
• Vapor Density: 5.03 – Heavier than air; will sink
• Vapor Pressure: 19.51 mmHg at 68 °F
• Stability/Shelf Life: Stable under recommended storage conditions.
• Refractive Index: Index of refraction: 1.3890 @ 20 °C/D
• Synonyms: Di-tert-butyl peroxide, tert-Butyl peroxide, Di-t-butyl peroxide, Cadox, Peroxide, bis(1,1-dimethylethyl), tert-Butylperoxide, Bis(tert-butyl) peroxide, (Tributyl)peroxide, di-t butyl peroxide, NSC 673, CCRIS 4613, HSDB 1326, Di-tertiary-butyl peroxide, EINECS 203-733-6, UNII-M7ZJ88F4R1, BIS(1,1-DIMETHYLETHYL)PEROXIDE, DTXSID2024955, Peroxide, tert-butyl-, NSC-673, (tert-C4H9O)2, Peroxide, bis-tert-butyl-, DTXCID704955, EC 203-733-6, BIS(1,1-DIMETHYLETHYL)PEROXIDE [HSDB], t-butyl peroxide bis(1,1-di-methylethyl)peroxide, DI-TERT-BUTYL PEROXIDE, (TECHNICALLY PURE), DI-TERT-BUTYL PEROXIDE, [TECHNICALLY PURE], Dibutyl peroxide (tertiary), tbutyl peroxide, Ditbutyl peroxide, ditertbutylperoxid, TBHP compound, tertbutyl peroxide, Bis(tbutyl)peroxide, Ditertbutyl peroxyde, PEROXIMON DB, Bis(tertbutyl) peroxide, DitertButyl hydroperoxide, B 50ELQ, Bis(1,1dimethylethyl)peroxide, Peroxide, bis(1,1dimethylethyl), UN3107, lsxwfxongksemy-uhfffaoysa-n, 110-05-4, t-Butyl peroxide, Trigonox B, Cadox TBP, 2-(tert-Butylperoxy)-2-methylpropane, Kayabutyl D, Perbutyl D, Interox DTB, Di-tert-butylperoxid, Peroxyde de butyle tertiaire, Di-tert-butyl peroxyde, Di-tert-Butyl hydroperoxide, di-tert-butylperoxide, Perossido di butile terziario, 2-tert-butylperoxy-2-methylpropane, Bis(1,1-dimethylethyl) peroxide, M7ZJ88F4R1, Bis(t-butyl)peroxide, 2,2′-dioxybis(2-methylpropane), CAS-110-05-4, Di-tert-butylperoxid [German], di(t-butyl) peroxide, Di-tert-butyl peroxyde [Dutch], Peroxyde de butyle tertiaire [French], Perossido di butile terziario [Italian], t-butylperoxide, tBuOOtBu, Di-t-butylperoxide, di-tertbutylperoxide, ditert.butylperoxide, 2-tert-butylperoxy-2-methyl-propane, MFCD00008803, di-tertbutyl peroxide, ditert-butyl peroxide, di-tert.butyl peroxide, di-tertiarybutylperoxide, ditertiary butylperoxide, ditertiarybutyl peroxide, di(tert.-butyl)peroxide, di(tert.butyl) peroxide, di-tert.-butyl peroxide, di-tertiary butylperoxide, ditertiary butyl peroxide, di-tertiary butyl peroxide, DTBP [MI], SCHEMBL14861, NSC673, SCHEMBL9239345, CHEMBL1558599, (CH3)3CO-OC(CH3)3, 2-tert-butyldioxy-2-methylpropane, Tox21_201461, Tox21_300099, AKOS015902599, 2-(tert-Butylperoxy)-2-methylpropane #, NCGC00091801-01, NCGC00091801-02, NCGC00091801-03, NCGC00254065-01, NCGC00259012-01, tert-Butyl peroxide (Luperox DI), 97%, Luperox(R) DI, tert-Butyl peroxide, 98%, D3411, NS00006093, A802134, Q413043, WLN: 1X1 & 1 & OOX1 & 1 & 1, F0001-0215

Application

Di-tert-butyl peroxide is primarily employed as a free-radical initiator in the polymerization of styrene, ethylene, and other monomers. It is also used in organic synthesis to facilitate crosslinking reactions and as a curing agent for silicone rubbers and resins. In the petrochemical industry, DTBP serves as an ignition accelerator for diesel fuels due to its controlled decomposition properties.

Safety and Hazards

GHS Hazard Statements

• H225: Highly Flammable liquid and vapor [Danger Flammable liquids]
• H242: Heating may cause a fire [Danger Self-reactive substances and mixtures; Organic peroxides]
• H341: Suspected of causing genetic defects [Warning Germ cell mutagenicity]
• H402: Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard]
• H412: Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P203, P210, P233, P234, P235, P240, P241, P242, P243, P273, P280, P303+P361+P353, P318, P370+P378, P403, P403+P235, P405, P410, P411, P420, and P501

Hazard Classes and Categories

• Flam. Liq. 2 (> 99.9%)
• Org. Perox. E (> 99.9%)
• Eye Irrit. 2 (35.6%)
• Muta. 2 (62.5%)
• Aquatic Chronic 3 (11.3%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.