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Arsenic trisulfide
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<p>Arsenic trisulfide is the <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with the formula <a href="/facts/Arsenic/k1c4f44D">As</a>2<a href="/facts/Sulfur/IK0amTfM">S</a>3. It is a dark yellow solid that is insoluble in water. It also occurs as the mineral <a href="/facts/Orpiment/RKzNkAYl">orpiment</a> , which has been used as a pigment called King's yellow. It is produced in the analysis of arsenic compounds. It is a group V/VI, <a href="/facts/Intrinsic_semiconductor/IcmdPfQJ">intrinsic</a> p-type <a href="/facts/Semiconductor/zFf3mGTE">semiconductor</a> and exhibits photo-induced phase-change properties. </p>