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liuyuanxiu金虫 (小有名气)
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[交流]
求助 关于氧化汞的问题
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各位GGJJDDMM们，氧化汞，红色氧化汞，黄色氧化汞有什么区别，在实际应用中选择哪一种，有什么原则吗？ 谢谢了 [ Last edited by liuyuanxiu on 2007-9-19 at 22:09 ] |
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liuyuanxiu
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chemcccc(金币+1,VIP+0):thx
chemcccc(金币+1,VIP+0):thx
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品 名:氧化汞 拼音:yanghuagong 英文名称：mercuric oxide 说明:HgO 俗称三仙丹。有两种变体：一种是红色氧化汞，鲜红色粉末，密度11.00-11.29。一种是黄色氧化汞，橘黄色粉末，相对密度11.03（275℃）。受光的作用缓慢地变为暗黑色，有毒！在500℃时分解为汞和氧。如果加热温度低于分解温度，颜色变黑，冷后又恢复原色。几乎不溶于水和乙醇，溶于硝酸和盐酸而形成高汞盐。用作氧化剂，并用于制有机汞化合物、医药制剂、分析试剂、陶瓷用颜料等。红色氧化汞由硝酸亚汞加热或硝酸汞与汞混合共热而得。黄色氧化汞由氢氧化钠（钾）或碳酸钠（钾）作用于硝酸汞或氯化汞而制得。 -------------------------------------------------------------------------------- 俗称“三仙丹”。化学式hgo。有两种，颗粒粗的为红色，细的为黄色。前者可作颜料、催化剂，制有机汞化合物等，后者有抗菌作用，可用于眼部表面炎症。 自己回答了，大家都不懂！ |
2楼2007-09-20 08:18:13
xhtangxh
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--- Merck Index ---
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chemcccc(金币+1,VIP+0):thx
chemcccc(金币+1,VIP+0):thx
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Title: Mercuric Oxide, Red CAS Registry Number: 21908-53-2 Additional Names: Red precipitate Molecular Formula: HgO Molecular Weight: 216.59. Percent Composition: Hg 92.61%, O 7.39% Literature References: Contains 99-99.5% HgO. Properties: Bright red or orange-red, heavy, odorless, crystalline powder or scales; orthorhombic structure; yellow when finely powdered. Poisonous! Dec on exposure to light into mercury and oxygen; at 400° becomes almost black, but red again on cooling; at 500° dec into mercury and oxygen. d 11.14. Practically insol in water; sol in dil HCl or HNO3 or in solns of alkali cyanides or iodides, slowly in solns of alkali bromides; insol in alcohol. Protect from light. Density: d 11.14 Use: In marine bottom paints, diluting pigments for painting on porcelain, with graphite as depolarizer in dry batteries. In Kjeldahl nitrogen determination; and as reagent for citric acid, thiophene, glucose, aldehyde, urea, acetone. As reagent and catalyst in organic reactions: J. S. Pizey, Synthetic Reagents, vol. 1 (John Wiley, New York, 1974) pp 295-319. Therap-Cat: Antiseptic (topical). Therap-Cat-Vet: Has been used as a topical antiseptic. Title: Mercuric Oxide, Yellow CAS Registry Number: 21908-53-2 Additional Names: Yellow precipitate Molecular Formula: HgO Molecular Weight: 216.59. Percent Composition: Hg 92.61%, O 7.39% Literature References: Contains 99-99.5% HgO. Properties: Yellow or orange-yellow, heavy, odorless powder, orthorhombic structure. Poisonous! Becomes red on heating and yellow again on cooling; more finely divided and more reactive than red mercuric oxide. Other physical properties and solubilities: see Mercuric Oxide, Red. Protect from light. Incompat: Reducing agents. Use: Similar to that of the red oxide; in the mfr of organic mercurials. In anal. chemistry for determining Zn or HCN; detecting acetic acid in formic acid, CO in gas mixtures. Therap-Cat: Topical antiseptic (ophthalmic). Therap-Cat-Vet: Has been used as a topical antiseptic, fungicide, in chronic skin conditions, conjunctivitis, corneal ulcers. |
3楼2007-09-20 11:52:55
