which of the folowing is not the property of plaster of paris
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The Paris Plaster is non-combustible and non-flammable. It normally has low chemical reactivity but, under extreme conditions, can act as an oxidising agent. It decomposes to create poisonous sulphur oxides at elevated temperatures. In order to form gypsum CaSO4, it reacts exothermically but slowly with moisture in the air or water.
Paris plaster, quick-setting gypsum plaster consisting of a fine white powder (hemihydrate of calcium sulphate) which, when moistened and allowed to dry, hardens. Plaster of Paris, known since ancient times, is named so because of its preparation from the plentiful gypsum found near Paris.
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