2618-77-1

Basic information

• Product Name: 2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE
• Synonyms: 2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE;VAROX DCP-40C;VAROX DCP-40KE;VAROX 230-XL;VAROX 118;1,1,4,4-tetramethyltetramethylene diperbenzoate;2,5-dimethylhexane-2,5-diyl diperbenzoate;2,5-Dimethylhexane-2,5-diperbenzoate
• CAS NO: 2618-77-1
• Molecular Formula: C₂₂H₂₆O₆
• Molecular Weight: 386.440002441406
• EINECS: 220-050-9
• Mol File: 2618-77-1.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 529.9 °C at 760 mmHg
• Flash Point: 229.5 °C
• Appearance: /
• Density: 1.143 g/cm³
• Vapor Pressure: 2.59E-11mmHg at 25°C
• Refractive Index: 1.534
• CAS DataBase Reference: 2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE(2618-77-1)
• EPA Substance Registry System: 2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE(2618-77-1)

Safety Data

• RIDADR: 3102
• HazardClass: 5.2
• PackingGroup: II
• Hazardous Substances Data: 2618-77-1(Hazardous Substances Data)

Usage

General Description

2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE is particularly sensitive to temperature rises and contamination. Above a given "Control Temperature" they decompose violently. 2,5-DIMETHYL-2,5-DI(BENZOYLPEROXY)HEXANE is generally stored or transported as a mixture, with an inert solid.

Reactivity Profile

Peroxides, such as 2,5-DIMETHYL-2,5-DI-(BENZOYLPEROXY)HEXANE, are good oxidizing agents. Organic compounds can ignite on contact with concentrated peroxides. Strongly reduced material such as sulfides, nitrides, and hydrides may react explosively with peroxides. There are few chemical classes that do not at least produce heat when mixed with peroxides. Many produce explosions or generate gases (toxic and nontoxic). Generally, dilute solutions of peroxides (<70%) are safe, but the presence of a catalyst (often a transition metal such as cobalt, iron, manganese, nickel, or vanadium) as an impurity may even then cause rapid decomposition, a buildup of heat, and even an explosion. Solutions of peroxides often become explosive when evaporated to dryness or near-dryness. Danger of explosion when dry. May explode from heat, shock, friction or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames.

InChI:InChI=1/C22H26O6/c1-21(2,27-25-19(23)17-11-7-5-8-12-17)15-16-22(3,4)28-26-20(24)18-13-9-6-10-14-18/h5-14H,15-16H2,1-4H3

Synthetic route

2,5-dimethyl-2,5-dihydroperoxyhexane (3025-88-5) + benzoyl chloride (98-88-4) → 2,5-dimethyl-2,5-di(benzoylperoxy)-hexane (2618-77-1)

Conditions	Yield
With pyridine

2,5-dimethyl-2,5-hexanediol (110-03-2) → 2,5-dimethyl-2,5-di(benzoylperoxy)-hexane (2618-77-1)

Conditions	Yield
Multi-step reaction with 2 steps 1: H2O2 2: pyridine View Scheme

2,5-dimethyl-2,5-di(benzoylperoxy)-hexane (2618-77-1) + 5'-(tert-butyl)-[1,1':3',1''-terphenyl]-4'-amine (173282-40-1) → N,N'-(2,2,5,5-tetramethyltetramethylenedioxy)bis[2-tert-butyl-4,6-diphenylphenylaminyl]

Conditions	Yield
With n-butyllithium In tetrahydrofuran; hexane at -78 - 20℃;	4.9%

2,5-dimethyl-2,5-di(benzoylperoxy)-hexane (2618-77-1) + 5'-(tert-butyl)-4,4''-dichloro-[1,1':3',1''-terphenyl]-4'-amine (178110-57-1) → N,N'-(2,2,5,5-tetramethyltetramethylenedioxy)bis[2-tert-butyl-4,6-bis(4-chlorophenyl)phenylaminyl]

Conditions	Yield
With n-butyllithium In tetrahydrofuran; hexane at -78 - 20℃;	3.3%

Upstream product

• 3025-88-5 2,5-dimethyl-2,5-dihydroperoxyhexane 
• 98-88-4 benzoyl chloride 
• 110-03-2 2,5-dimethyl-2,5-hexanediol 

Relevant articles and documents

Batch process for manufacturing and purifying liquid organic peroxide by distillation

A batch process for the manufacture of liquid organic peroxides, such as peroxy esters and diacyl peroxides, by reacting an acid chloride, a hydroperoxide and an alkali metal hydroxide uses a countercurrent, packed distillation column for recovering a purer, drier product with higher yield than previous batch drying processes.