Antimony pentasulphide

This compound cannot be prepared directly from the trisulphide and sulphur, because it is decomposed at a temperature below that at which the latter substances would react. As has just been seen, however, the higher sulpho-salt of antimony can be readily prepared in the wet way and this, on decomposition with a dilute acid, yields antimony pentasulphide. This substance is used in vulcanizing rubber and produces a red colored product. 

Materials sodium sulphantimonate, Na3SbS4-9H20, from pre- 

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Write equations for all reactions involved in the preparation of antimony pentasulphide from stibnite. 

Upon acidification of the thioantimonate solution with hydrochloric acid, antimony pentasulphide is precipitated initially but usually decomposes partially into the trisulphide and sulphur ... 

Hydrogen sulphide orange-red precipitate of antimony pentasulphide, Sb2S5, in moderately acid solutions. The precipitate is soluble in ammonium sulphide solution (yielding a thioantimonate) in alkali hydroxide solutions, and is also dissolved by concentrated hydrochloric acid with the formation of antimony trichloride and the separation of sulphur. The thio-salt is decomposed by acids, the pentasulphide being precipitated. 

Carbon Tetrachloride, CCI4, is the final product of the action of chlorine on methane. It is a heavy liquid which has a pleasant odor resembling that of chloroform. It boils at 76.7°, and has the specific gravity 1.593 at 20°. It is prepared commercially by the action of chlorine on carbon bisulphide in the presence of antimony pentasulphide, which acts as a carrier —... 

Antimony Pentasulphide, Sb.jS,..—It is obtained by decomposing the sulpho-salts with acids. It is called soufre dore cPantiraoine in French, and Goldsckwefel in German. It is generally obtained in a pure condition from Schlippe s salt —... 

The so-called Qdldsehwefel (antimony pentasulphide, Sb Sj) is used for tins purpose. It is thus made —Powdered antimony sulphide is heated with sulphur and sodium hydroxide ... 

According to the Colour Index (1971 Cl 77061) this is antimony pentasulphide - that is, the so-called antimony(V) sulfide (q.v), however, it may also be antimony oxide sulfide (. v.) since the former is orange-yeUow, the latter red. 

The Colour Index (1971) lists this compound ( antimony pentasulphide ) as Cl 77061 it was also known as go/rfen antimony sulphide, antimonial saffron and antimony red (Colour Index, 91 Merck Index, 1996). 

Chemicals such as magnesium and lead oxides, calcium hydroxide, antimony tri- and pentasulphide can be used as boosters for organic accelerators for some products, such as thick walled large volume articles, e.g., rollers. 

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