Description

2,5-Dimethyl-2,5-di-(tert-butylperoxy)hexane (CAS No. 78-63-7) is a high-purity organic peroxide widely utilized as a radical initiator in polymerization reactions and crosslinking applications. With the molecular formula C₁₆H₃₄O₄, this compound is known for its exceptional thermal stability and controlled decomposition properties, making it ideal for industrial and research applications requiring precise radical generation. It is supplied as a liquid with a purity of ≥95%, ensuring consistent performance in synthetic processes. Commonly referred to by its IUPAC name, 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane, this peroxide is a critical reagent in the production of polymers, elastomers, and specialty chemicals. Store in a cool, dry place away from incompatible materials to maintain stability and safety.

Properties

• CAS Number: 78-63-7
• Complexity: 252
• IUPAC Name: 2,5-bis(tert-butylperoxy)-2,5-dimethyl-hexane
• InChI: InChI=1S/C16H34O4/c1-13(2,3)17-19-15(7,8)11-12-16(9,10)20-18-14(4,5)6/h11-12H2,1-10H3
• InChI Key: DMWVYCCGCQPJEA-UHFFFAOYSA-N
• Exact Mass: 290.24570956
• Molecular Formula: C16H34O4
• Molecular Weight: 290.44
• SMILES: CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C
• Topological: 36.9
• Monoisotopic Mass: 290.24570956
• Physical Description: 2,5-dimethyl-2,5-di-hexane, [<= 52% with inert solid] is a clear, yellow liquid. also for storage and transport mixed with inert solid.
• Boiling Point: 122 to 126 °F at 0.1 mmHg
• Melting Point: 46 °F
• Flash Point: 185 °F
• Solubility: less than 1 mg/mL at 73 °F
• Synonyms: 78-63-7, 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane, 2,5-Dimethyl-2,5-di-(tert-butylperoxy)hexane, Varox, Perhexa 3M40, Trigonox 101-101/45, CCRIS 4626, EINECS 201-128-1, NSC 38203, BRN 1863369, DTXSID9025110, UNII-923755EYY5, VAROX DBPH, NSC-38203, Hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)-, 923755EYY5, 2,5-Dimethyl-2,5-bis(tert-butylhydroperoxy)hexane, DTXCID005110, EC 201-128-1, Peroxide, (1,1,4,4-tetramethyl-1,4-butanediyl)bis((1,1-dimethylethyl), HEXANE, 2,5-DIMETHYL-2,5-DI(t-BUTYLPEROXY)-, Peroxide, (1,1,4,4-tetramethyl-1,4-butanediyl)bis[(1,1-dimethylethyl), 2,5-DIMETHYL-2,5-DI-(TERT-BUTYLPEROXY)HEXANE, (TECHNICALLY PURE), 2,5-DIMETHYL-2,5-DI-(TERT-BUTYLPEROXY)HEXANE, [TECHNICALLY PURE], (1,1,4,4-TETRAMETHYL-1,4-BUTANEDIYL)BIS((1,1-DIMETHYLETHYL) PEROXIDE, (1,1,4,4-TETRAMETHYL-1,4-BUTANEDIYL)BIS[(1,1-DIMETHYLETHYL) PEROXIDE, DMHBP, PERHEXA 25B, C 8 (VULCANIZER), TRIGONOX 101E5, PERHEXA 25B40, Trigonox 101101/45, RPZ 101, TRIGONOX 101-40MD-GR, 2,5Dimethyl2,5di(tbutylperoxy)hexane, 2,5Bis(tertbutyldioxy)2,5dimethylhexane, 2,5Dimethyl2,5bis(tertbutyldioxy)hexane, 2,5Dimethyl2,5di(tertbutylperoxy)hexane, Hexane, 2,5dimethyl2,5di(tbutylperoxy), 2,5Bis(tertbutylperoxy)2,5dimethylhexane, 2,5Dimethyl2,5bis(tertbutylperoxy)hexane, 2,5-di(t-butylperoxy)-2,5-dimethylhexane, Hexane, 2,5dimethyl2,5di(tertbutylperoxy), 2,5-di(tert-butylperoxy)-2,5-dimethylhexane, 2,5Dimethyl2,5bis(tertbutylhydroperoxy)hexane, 2,5-di-tert-butyl-2,5-dimethylhexyl peroxide, 2,5-DIMETHYL-DI(TERT-BUTYL)PEROXYHEXANE, Ditertbutyl 1,1,4,4tetramethyltetramethylene diperoxide, (1,1,4,4Tetramethyltetramethylene)bis(tertbutyl peroxide), Peroxide, (1,1,4,4tetramethyltetramethylene)bis(tertbutyl, Peroxide, (1,1,4,4tetramethyl1,4butanediyl)bis((1,1dimethylethyl), Peroxide, 1,1′(1,1,4,4tetramethyl1,4butanediyl)bis(2(1,1dimethylethyl), 201-128-1, un3105, 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane, Triqanox XQ 8, Lupersol 101, Luperco 101XL, Luperox 101, Varox 50, 2,5-Dimethyl-2,5-bis(tert-butylperoxy)hexane, 2,5-Dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-Bis(tert-butyldioxy)-2,5-dimethylhexane, (1,1,4,4-Tetramethyltetramethylene)bis(tert-butyl peroxide), Kayahexa AD 40C, Varox Liquid, Kayahexa AD, Interox DHBP, Trigonox XQ 8, Kayahexa AD 40, Lupersol 101XL, Trigonox 101, HC 4 (peroxide), RC 4 (peroxide), TC 8 (catalyst), Perhexa 2.5B, Varox DBPH 50, Luperco 101X45, Perhexa 2.5B40, Interox DHBP 45IC/G, CT 8 (crosslinking agent), AD 40C, CR 05, 2,5-Dimethyl-2,5-bis(tert-butyldioxy)hexane, Di-tert-butyl 1,1,4,4-tetramethyltetramethylene diperoxide, Peroxide, (1,1,4,4-tetramethyltetramethylene)bis(tert-butyl, SCHEMBL23327, 2,5-bis(tert-butyldioxy)hexane, 2,5-di(tert-butylperoxy)hexane, CHEMBL1874231, SCHEMBL15767645, 2,5-bis(tert-butylperoxy)hexane, NSC38203, Tox21_300177, 2,5-bis(tert-butylhydroperoxy)hexane, AKOS015912764, CAS-78-63-7, Peroxide,1,1′-(1,1,4,4-tetramethyl-1,4-butanediyl)bis[2-(1,1-dimethylethyl), NCGC00164156-01, NCGC00164156-02, NCGC00253942-01, 2,5-DI(TERT-BUTYLPEROXIDE)HEXANE, AC-16097, 2,5-bis(t-butylperoxy)-2,5-dimethylhexane, 2,5-dimethyl-2,5-di(t-butyl peroxy)hexane, NS00010622, 2,5-dimethyl-2,5di(tert.butylperoxy) hexane, Hexane,5-dimethyl-2,5-di(tert-butylperoxy)-, H11786, 2,5-di(tert.-butyl peroxy)-2,5-dimethyl hexane, 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane, 93%, Q27271465, WLN: 1X1&1&OOX1&1&2X1&1&OOX1&1&1, 2,5-Bis(tert-butyldioxy)-2,5-dimethylhexane (>90%), Peroxide,1,4,4-tetramethyltetramethylene)bis[tert-butyl, (1,4,4-Tetramethyltetramethylene)bis[tert-butyl peroxide], Peroxide,1,4,4-tetramethyl-1,4-butanediyl)bis[(1,1-dimethylethyl), Luperox(R) 101, 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane, technical grade, 90%, Peroxide, 1,1′-(1,1,4,4-tetramethyl-1,4-butanediyl)bis(2-(1,1-dimethylethyl), Luperox(R) 101XL45, 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane, blend with calcium carbonate and silica

Application

2,5-Dimethyl-2,5-di-(tert-butylperoxy)hexane is primarily used as a radical initiator in the polymerization of styrene, ethylene, and other vinyl monomers. It is also employed in the crosslinking of polyethylene and silicone rubbers to enhance mechanical and thermal properties. Additionally, this peroxide serves as a curing agent in the manufacture of high-performance composites and adhesives. Its controlled decomposition at elevated temperatures makes it suitable for applications requiring precise reaction kinetics.

Safety and Hazards

GHS Hazard Statements

• H242: Heating may cause a fire [Danger Self-reactive substances and mixtures; Organic peroxides]

Precautionary Statements

• P210, P234, P235, P240, P280, P370+P378, P403, P410, P411, P420, and P501

Hazard Classes and Categories

• Flam. Liq. 3 (11.8%)
• Self-react. D (80.3%)
• Skin Irrit. 2 (96.6%)
• Eye Irrit. 2 (35.3%)
• Aquatic Chronic 4 (34.5%)

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