Calcium peroxide, decomposition

A synergic action of a mixture of epoxy resins with cadmium stearate has been demonstrated in the reaction of radical decomposition of hydroperoxide. This mixture exhibits activity in the inhibition reaction, exceeding not only that expected from a calculation on the basis of additivity, but also the activity of the most energetic inhibitor of peroxide decomposition - cadmium stearate (Fig. 101) [12]. Synergic action in the stabilization of polyvinyl chloride by mixtures of epoxy compounds with lead silicate, mixtures of the autocondensation products of cyclohexanone with lead silicate, as well as mixtures of the autocondensation products of cyclohexanone with organotin compounds and with calcium stearate, is described in [74, 77, 98]. 

Tetraethylammonimn bromide was recrystallized from the saturated acetonitrile solution by addition of diethyl ether abundance. The salt purity (99.6 %) was determined by aigentmmnetric titration with potenciometric fixation of the equivalent point. Acetonitrile was purified according to [17]. Its purity was controlled by electroconductivity % value, which was within (8.5 0.2)T0 Om sm at 303K. Cumene was subjected to acid - alkali purification with subsequent desiccation under calcium chloride and distillation according to [18]. Reactions of cyclohexanone peroxides decomposition were carried out in the glass... 

This oxide catalyses the violent or even explosive decomposition of hydrogen peroxide. This reaction explains the numerous accidents mentioned involving the contact of hydrogen peroxide with rusted iron. Two accidents of this nature dealt with mixtures of hydrogen peroxide with ammonia and an alkaline hydroxide The detonations took place after a period of induction of respectively several hours and four minutes. Iron (III) oxide also catalyses the explosive decomposition of calcium hypochlorite. 

See also Acetoacetyl-CoA in citric acid cycle, 6 633 Acetyl cyclohexanesulfonyl peroxide (ACSP), 74 282 78 478 Acetylene(s), 7 177-227, 227-228 25 633 addition of hydrogen chloride to, 73 821 from calcium carbide, 4 532, 548 carbometalation of, 25 117 as catalyst poison, 5 257t chemicals derived from, 7 227-265 decomposition of, 70 614 Diels-Alder adduct from cyclopentadiene, 8 222t direct polymerization, 7 514 economic aspects of, 7 216-217 explosive behavior of, 7 181-187 as fuel, 7 221-222 health and safety factors related to, 7 219... 

Decomposition was initiated by the addition of a concentrated aqueous solution of calcium and sodium permanganate to the hydrogen peroxide. The use of potassium permanganate proved ineffective since KMn04 is insufficiently soluble in water and the solution contains inadequate MnO -ions for rapid initiation of the reaction. 

OSHA PEL TWA 2 mg(Sn)/m3 ACGIH TLV IW A 2 mg(SnVm3 SAFETY PROFILE Poison by ingestion, intraperitoneal, intravenous, and subcutaneous routes. Experimental reproductive effects. Human mutation data reported. Potentially explosive reaction with metal nitrates. Violent reactions with hydrogen peroxide, ethylene oxide, hydra2ine hydrate, nitrates, K, Na. Ignition on contact with bromine trifluoride. A vigorous reaction with calcium acetylide is initiated by flame. When heated to decomposition it emits toxic fumes of Cl. See also TIN COMPOUNDS. 

The stability of the [—0—0—] ion is evidently due to the low polarising power of these cations compared with those earlier in the group. Hydrates of the form MOg.SHgO are formed by Ca, Sr and Ba when H2O2 is added to cold saturated solutions of the hydroxides dehydration is possible without decomposition. All three anhydrous peroxides contain [—0—0—] ions in the tetragonal calcium carbide lattice. They are the only simple compounds in this group which exhibit paramagnetism. 

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