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liuyuanxiu

金虫 (小有名气)

[交流] 求助 关于氧化汞的问题

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

金虫 (小有名气)


chemcccc(金币+1,VIP+0):thx
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。


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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
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xhtangxh

木虫 (著名写手)

有木有虫

--- Merck Index ---


chemcccc(金币+1,VIP+0):thx
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
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