Arsenic sulfide Yellow

Chemical Designations - Synonyms Arsenic Yellow King s Gold King s Yellow Ointment Yellow Arsenic Sulfide Chemical Formula AsjSj. 

Ordinarily arsenic does not react with water, hydrogen, caustic soda or hydrochloric acid. However, in presence of an oxidant it reacts with concentrated HCl. In concentrated HCl solution it reacts with hydrogen sulfide to form a precipitate of yellow arsenic sulfide, AS2S3. It forms orthoarsenic acid, H3ASO4 on reaction with concentrated nitric acid and chlorinated water. 

Synonyms arsenic trisulfide arsenic sulfide arsenous sulfide king s gold king s yellow orpiment yellow arsenic sulfide... 

YELLOW ARSENIC SULFIDE (1303-33-9) Contact with water or steam releases hydrogen sulfide. Reacts, possibly violently, with strong oxidizers, halogens, hydrogen peroxide, sodium sulfide, sulfur, potassium nitrate. Contact with acids and acid fumes produces highly toxic fumes of arsenic, hydrogen sulfide, and sulfur dioxide. 

Arsenic TrUlllfide. Yellow arsenic sulfide or pi-ment auripigment arsenic yellow king s yellow king s gold. ASjS mol wt 246.00. As 60,90%, S 39,10%, The article of commerce contains much less sulfur than theory. Piepn Gmelin s, Arsenic (8th ed.) 17, pp 422-433 (1952). 

Vinegar Acid Acetic Acid Yellow Arsenic Sulfide Arsenic Trisulfide... 

The oxide is obtained from the sulfide by roasting it in air. The stable form of arsenic is the gray or metallic form although other forms are known. Yellow arsenic is obtained by cooling the vapor rapidly, and an orthorhombic form is obtained when the vapor is condensed in the presence of mercury. Arsenic is used in the production of a variety of insecticides and herbicides, and in alloys with copper and lead. Some arsenic compounds are important medicinal compounds and a number of pigments contain arsenic compounds. The surface tension of lead is increased by dissolving a small amount of arsenic in it. This allows droplets of molten lead to assume a spherical shape, and this fact is utilized in the production of lead shot. 

SYNS ARSENIC SESQUISULFIDE ARSENIC SULFIDE YELLOW ARSENIC SULPHIDE ARSENIC TERSULPHIDE ARSENIC TRISULFIDE ARSENIC TRISULFIDE (DOT) ARSENIC YELLOW ARSENIOUS SULPHIDE ARSENOUS SULFIDE AURIPIGMENT C.I. 77085 C.L PIGMENT YELLOW DIARSENIC TRISULFIDE DIARSENIC TRISULPHIDE KING S GOLD KING S YELLOW ORPIMENT... 

Synonyms Arsenic sulfide Cl 77085 Pigment yellow 39 Realgar Red arsenic Red arsenic glass Red arsenic sulfide Ruby arsenic... 

There are several complications endemic in this system. First, as was common experience from qualitative analysis with arsenic or tin, reagents of either oxidation state, with an excess of yellow ammonium sulfide, give the same higher oxidation state ... 

When the discovery became known, a factory owner, K. S. L. Hermann in Schone-beck, and a Medidnal Counsellor, Dr J. C. H. Roloff in Magdeburg, contacted Professor Stromeyer. Dr Roloff had made a pharmacy inspection some years earlier and confiscated zinc oxide, as it seemed to contain arsenic. From an add solution of the oxide, hydrogen sulfide in fact predpitated a yellow sulfide, identified as arsenic sulfide. The zinc oxide had been manufactured at Hermann s fadory from a Silesian calamine ore. The two gentlemen now sent to Professor Stromeyer both zinc oxide, prepared from the ore from Silesia, and the yellow sulfide with supposed content of arsenic. Stromeyer could rapidly state that the yellow substance was not the sulfide of arsenic but a sulfide of the metal he himself had discovered. 

In the systematic scheme of qualitative analysis, tellurium is precipitated as free tellurium, along with the basic and acid sulfides, when the hydrochloric acid solution is treated with hydrogen sulfide. If the precipitate is digested with yellow ammonium sulfide, the tellurium, together with arsenic, antimony and tin sulfides, goes into solution as a sulfosalt. Since solutions of alkali sulfarsenate, sulfantimonate, and sulfostannate are not affected by the addition of alkali sulfite, tellurium can thus be detected in the presence also of arsenic, antimony, and tin. 

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