| Identification | Back Directory | [Name]
Tetraarsenic tetrasulfide. | [CAS]
12279-90-2 | [Synonyms]
Tetraarsenic tetrasulfide.
2,4,6,8-Tetrathia-1,3,5,7-tetraarsatricyclo[3.3.0.03,7]octane | [Molecular Formula]
As4S4 | [MOL File]
12279-90-2.mol | [Molecular Weight]
427.95 |
| Chemical Properties | Back Directory | [Melting point ]
320° | [Boiling point ]
bp 565° | [density ]
3.5 | [solubility ]
insoluble in H2O; slightly soluble in benzene; soluble in alkaline solutions | [form ]
red monoclinic crystals | [color ]
red monoclinic crystals, crystalline | [Water Solubility ]
insoluble H2O, hot HCl; soluble warm alkali [KIR78] | [CAS DataBase Reference]
12279-90-2 |
| Hazard Information | Back Directory | [Chemical Properties]
red or orange solid; naturally occurring mineral; can be manufactured by heating iron pyrites and arsenopyrite; used in pyrotechnics [KIR78] | [Uses]
As pigment in painting; in fireworks as blue fire and to give an intense white flame; manufacture of shot; calico printing and dyeing; tanning and depilating hides. | [Occurrence]
Arsenic sulfide occurs in nature as the mineral realgar. It is used as a pigment; in pyrotechnics to produce blue fire; in dyeing and calico printing; and as a depilatory for hides. | [Preparation]
Arsenic sulfide is prepared commercially by heating a mixture of iron pyrites and arsenopyrite; or by heating arsenic trioxide with sulfur. The compound is then sublimed and collected. It may be also made from arsenic sesquisulfide - by either heating with sodium bicarbonate in a sealed tube or on prolong treatment with boiling solution of sodium carbonate. |
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