Dipropyl peroxide

Unexpected explosions have occurred with dipropyl peroxides. See other dialkyl peroxides... 

Di(fe/ f-butylpcroxy)butanc. 3565 Diethyl peroxide, 1699 Dimethyl peroxide, 0923 Dipropyl peroxide, 2547... 

Di-2-propenyl phosphonite, see Diallyl phosphite, 2450 Dipropionyl peroxide, 2436 Dipropylaluminium hydride, 2547 f Dipropylamine, 2563a f Dipropyl ether, 2538 Dipropylmercury, 2532 Dipropyl peroxide, 2542 Dipropyl peroxydicarbonate, 3030 Dipropylzinc, 2546 Dipyridinesodium, 3274 Dipyridinium dichromate, 3298... 

Dimethyl peroxide, 0919 Dipropyl peroxide, 2542 Ethyl methyl peroxide, 1278 See PEROXIDES... 

Olefins obtained from petroleum cracking gave mixed dipropylalkylphos-phonates when heated in a similar manner with dipropyl phosphite in the presence of di-r-butyl peroxide for 16 h at 130°C. 

Bis(fluoroformyl) peroxide, 0625 Bis-3-(2-furyl)acryloyl peroxide, 3640 Bis(trichloroacetyl) peroxide, 1361 Bis(trifluoroacetyl) peroxide, 1367 Diacetyl peroxide, 1537 Dibenzenesulfonyl peroxide, 3499 Dibenzoyl peroxide, 3639 Di-3-camphoroyl peroxide, 3807 Dicrotonoyl peroxide, 2986 Dicyclohexylcarbonyl peroxide, 3667 Didodecanoyl peroxide, 3857 Di-2-furoyl peroxide, 3245 Dihexanoyl peroxide, 3554 Diisobutyryl peroxide, 3032 Diisopropyl peroxydicarbonate, 3034 Dimethanesulfonyl peroxide, 0931 Di-2-methylbutyryl peroxide, 3354 Di-l-naphthoyl peroxide, 3831 3,6-Dioxo-l,2-dioxane, 1445 Dipropionyl peroxide, 2442 Dipropyl peroxydicarbonate, 3035 Di-4-toluenesulfonyl peroxide, 3656 Peroxodisulfuryl difluoride, 4328 Phthaloyl peroxide, 2900 Potassium benzenesulfonylperoxosulfate, 2257 Potassium O-O-benzoylmonoperoxosulfate, 2684 (9-TriIIuoroacctyl-.S -lluorofonny 1 thioperoxide, 1050 See PEROXIDES, PEROXYCARBONATE ESTERS... 

Di-n-propyl-peroxide, C3H7—OO—C3H.T, mw 118.17, 0 27.08% liquid, bp 51-53° at 8cm press. It can. be prepd from a mixt of hydrogen peroxide (cooled to —20°), KOH in water St dipropyl sulfate. The non-aqueous upper layer was separated by distillation at reduced pres sure (Ref 4). This peroxide exploded at si lower pressures than Diethyl Peroxide (Refs 3, 4 St 5)... 

Nitroheptane. Prepare a solution of pertrifluoroacetic acid in acetonitrile as follows. Place 50 ml of acetonitrile in a two-necked, 250-ml round-bottomed flask fitted with a dropping funnel and a reflux condenser. Insert a plastic-covered magnetic stirrer follower bar and cool the flask in an ice bath sited on the stirrer unit. To the cooled and stirred solution add 5.8 ml (0.2 mol) of 85 per cent hydrogen peroxide (1) and then 39.0 ml (58.1 g, 0.24 mol) of trifluoroacetic anhydride. Stir the solution for 5 minutes and then allow to warm to room temperature. In a three-necked, 500-ml round-bottomed flask fitted with a sealed stirrer unit, dropping funnel and reflux condenser place 200 ml of acetonitrile, 47 g (0.56 mol) of sodium hydrogen carbonate, 2g of urea and 12.9g (0.1 mol) of dipropyl ketoxime. Heat the stirred suspension under reflux on the water bath and add dropwise over 90 minutes the prepared solution of pertrifluoroacetic acid. When the addition is complete heat the mixture under reflux for 1 hour. Pour the cooled reaction mixture into 600 ml of cold water and extract with four 100 ml portions of dichloromethane (note the organic layer is the upper layer in the first extraction, but subsequently it is the lower layer). Wash the combined extracts with... 

Dipropionyl peroxide, 2436 Dipropyl peroxydicarbonate, 3030 Peroxodisulfuryl difluoride, 4322 Phthaloyl peroxide, 2895 Potassium benzenesulfonylperoxosulfate, 2250 Potassium O—O-benzoylmonoperoxosulfate, 2680 O-Trifluoroacetyl-S -fluoroformyl thioperoxide, 1047 See PEROXIDES, PEROXYCARBONATE ESTERS... 

Many laboratory accidents have been ascribed to presence of peroxides in solvents, usually, but not exclusively ethers. Storage of the solvents for over-long periods, often under poor conditions, is a common feature of the incidents. When peroxides are removed from solvents by chromatographic adsorption on alumina columns, the concentrated band of strongly adsorbed peroxides at the top of the column may become hazardous if the solvent evaporates [1], The use of self-indicating molecular sieve under nitrogen is described as an effective method of de-peroxidising THF, diethyl and dipropyl ethers, suitable also for bulk-scale operations [2]. 

Dimethyl peroxydicarbonate, 1539 Dipropyl peroxydicarbonate, 3030 See other PEROXIDES... 

Many solvents form dangerous levels of peroxides during storage e.g., dipropyl ether, divinylacetylene, vinylidene chloride, potassium amide, sodium amide. Other compounds form peroxides in storage but concentration is required to reach dangerous levels e.g., diethyl ether, ethyl vinyl ether, tetrahydrofuran, p-dioxane, l,l-diethox) eth-ane, ethylene glycol dimethyl ether, propyne, butadiene, dicyclopentadiene, cyclohexene, tetrahydronaphthalenes, deca-hydrona-phthalenes. Some monomeric materials can form peroxides that catalyze hazardous polymerization reactions e.g., acr) lic acid, acr)Ionitrile, butadiene, 2-chlorobutadiene, chlorotrifluoroethylene, methyl methacrylate, styrene, tetrafluoroethylene,... 

DIPROPYL KETONE (123-19-3) CtH O Combustible liquid. Forms explosive mixture with air (flash point 118°F/48°C cc Fire Rating 2). Violent reaction with strong oxidizers, aldehydes, nitric acid, perchloric acid. Incompatible with strong bases, amines, amides, inorganic hydroxides hydrogen peroxide. A variety of unstable peroxides may be formed fi"om the reaction with hydrogen peroxide. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, or CO2 extinguishers. 

DIPROPYL ETHER (111-43-3) Forms explosive mixture with air (flash point 70°F/ 21°C). Forms unstable and explosive peroxides, espeeially when anhydrous. Reacts violently with oxidizers, permanganates, peroxides, ammonium persulfate, bromine dioxide, acyl halides, strong acids sulfuric acid, nitric acid. 

Dipropionyl. See 3,4-Hexanedione Dipropionyl peroxide. See Propionyl peroxide 1,1-Dipropoxyethane Dipropyl acetal. See Acetaldehyde dipropyl acetal Dipropyl adipate... 

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