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Erythema ab igne (Latin for 'redness from fire') EAI, also known as hot water bottle rash, [2] is a skin condition caused by long-term exposure to heat (infrared radiation). [3] Prolonged thermal radiation exposure to the skin can lead to the development of reticulated erythema , hyperpigmentation , scaling, and telangiectasias in the affected ...
Antimony(III) sulfate was first produced in 1827 by the reaction of antimony(III) oxide and 18 molar sulfuric acid at 200 °C: [1]. Sb 2 O 3 + 3 H 2 SO 4 → Sb 2 (SO 4) 3 + 3 H 2 O. The concentration of the sulfuric acid is important, as a lower concentration will produce basic antimony oxides, while a higher concentration will produce antimony(III) pyrosulfate.
When a warm carbon disulfide solution of SbBr 3 is rapidly cooled, it crystallizes into the needle-like α-SbBr 3, which then slowly converts to the more stable β form. [2] Antimony tribromide hydrolyzes in water to form hydrobromic acid and antimony trioxide: 2 SbBr 3 + 3 H 2 O → Sb 2 O 3 + 6 HBr
2 Sb + 3 S → Sb 2 S 3. Sb 2 S 3 is precipitated when H 2 S is passed through an acidified solution of Sb(III). [9] This reaction has been used as a gravimetric method for determining antimony, bubbling H 2 S through a solution of Sb(III) compound in hot HCl deposits an orange form of Sb 2 S 3 which turns black under the reaction conditions. [10]
Antimony is a chemical element; it has symbol Sb (from Latin stibium) and atomic number 51. A lustrous grey metal or metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb 2 S 3). Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name kohl. [11]
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