Abstract: An azeotropic solvent composition comprising about 64.6 to 89.0% by weight of tetrachlorodifluoroethane, about 3.7 to 34.2% by weight of an alcohol having carbon atoms of 1 to 5 and about 1.2 to 7.3% by weight of nitroethane.

Abstract: A fluorine-containing betaine compound of the formula: ##STR1## wherein Rf is a polyfluoroalkyl group having 3 to 21 carbon atoms, A is a group of the formula: ##STR2## (wherein R.sup.4 is a hydrogen atom or an acyl group having 2 or 3 carbon atoms and p is an integer of 1 to 5), R.sup.1 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or a group of the formula: Rf--A--, R.sup.2 and R.sup.3 are each a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms, m is an integer of 2 to 6 and n is an integer of 1 to 4, which is useful as an additive to a foam fire-extinguishing composition for polar organic liquids.

Abstract: A dry cleaning composition comprising as effective components a fluorine-containing hydrocarbon solvent and at least one surfactant selected from the group consisting of organic acid salts of monoamines represented by the formula ##STR1## wherein R.sub.1 is alkyl having 6 to 20 carbon atoms, R.sub.2 is hydrogen atom or CH.sub.3, m and n are each zero or an integer of 1 to 20, and are further defined by 3.ltoreq.m + n.ltoreq.20, R.sub.3 is hydrogen atom or alkyl having 6 to 20 carbon atoms when n is zero and R.sub.3 is hydrogen atom when m is 1 to 20, and organic acid salts of diamines represented by the formula ##STR2## wherein R.sub.2 is as defined above, R.sub.4 is alkyl having 6 to 20 carbon atoms, R.sub.5 is alkylene having 2 to 6 carbon atoms, l is zero or an integer of 1 to 20, m and n are as defined above, and 3.ltoreq.l + m + n.ltoreq.20.