rhombohedral crystal structure) was previously proposed for this use. Metal separation Octachlorpropane reacts with niobium pentoxide and tantalum pentoxide at atmospheric pressure yielding the corresponding chlorides. It also reacts with titanium dioxide, if the other two oxides are present. This reaction, followed with distillation of the titanium tetrachloride at about 225 °C, could be an effective way to remove from mixtures of those oxides. Pesticide Octachloropropane has been commercialized as a snail killer with the brand name HRS-1622, although it was not found to be very effective. Octachloropropane was found to be highly toxic to larvae of the housefly, with an efficiency comparable to decachlorobutane and hexachlorobenzene (BHC). Unlike the latter, it is somewhat volatile and thus effective even without physical contact with the solid. Environmental concerns Octachloropropane was detected as a relatively minor item among dozens of highly chlorinated and perchlorinated hydrocarbons present as contaminants in the carbon tetrachloride produced from methanol by a plant in China, and also in the condensed waste from etching aluminum films in an integrated circuit factory. See also Hexachloroethane Octafluoropropane Hexachlorocyclopropane References <references> </ref> </references> Chloroalkanes