Peroxide-forming substances

In addition, hydrocarbons containing tertiary hydrogen atoms may form peroxides as follows  

A Comprehensive Guide to the Hazardous Properties of Chemical Substances, by Pradyot Patnaik Copyright 2007 John Wiley Sons, Inc. 

a large number of substances with the structural features shown above may form peroxides. However, these substances do not present a peroxide hazard to the same extent. The tendency of organic compounds to form peroxides decreases according to their structures as follows ethers and acetals olefins halogenated olefins vinyl compounds dienes aUcynes alkylbenzenes isoparaffins alkenyl esters secondary alcohols ketones aldehydes ureas and amides. 

Presented below are some of the common compounds or common classes of compounds that can form peroxides on storage or on concentration (evaporation or distillation). 

Diethyl ether Diisopropyl ether Divinyl ether Other aliphatic ethers Tetrahydrofuran 

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If you are certain that NO peroxide forming substances are present, then proceed to Question 9. If you are uncertain as to whether a material is peroxide forming, a chemist or other expert should be consulted. Table 3.3 shows some chemical structures susceptible to peroxide formation. 

In further support of his theory, Lewis notes that although cracked gasolines contain peroxide-forming substances, they show mnch less tendency to knock than do the uncracked gasolines. He suggests that antiknock compounds prevent the primary dehydrogenation of a saturated hydrocarbon to an olefin which is the necessary step according to his theory. 

Substances that are reactive with ubiquitous substances such as air (spontaneously combustible/pyrophoric, peroxide-forming), water (water-reactive), or ordinary combustibles (oxidizers)... 

Is any substance identified as peroxide forming YES Organics in feed have propensity to form organic peroxides under right conditions... 

In 1858 Schonbem noticed that when many substances were exposed to atmospheric oxidation, the oxidisable material appeared to combine with half a molecule of oxygen, leaving the other half in the form of hydrogen peroxide or ozone. This is well exemplified by the corrosion of many non-ferrous metals, such as lead and zinc. When lead, mixed with mercury, is shaken with dilute sulphuric acid in the presence of air or oxygen, lead sulphate is formed, together with some hydrogen peroxide. The amount of the latter is readily ascertained by titration of a portion of the liquid with permanganate, and the quantity of sulphuric acid involved is estimated by titration with alkali. It is then found that the amount of peroxide formed is equivalent to that of the lead dissolved. Thus... 

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