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乙酸铅

乙酸铅(II)
IUPAC名
Lead(II) acetate
乙酸铅(II)
系统名
Lead(II) ethanoate
英文名 Lead(II) acetate
别名 醋酸铅
识别
CAS号 301-04-2  checkY
6080-56-4(三水合物)  ☒N
51404-69-4(碱式乙酸铅)  ☒N
PubChem 16685321
ChemSpider 8956
SMILES
 
  • CC(=O)[O-].CC(=O)[O-].[Pb+2]
EINECS 206-104-4
RTECS OF8050000
MeSH lead+acetate
性质
化学式 Pb(C2H3O2)2
摩尔质量 325.29 g/mol(无水) 379.33(三水合物) g·mol⁻¹
外观 白色粉末或无色,花状晶体[1]
密度 3.25g/cm3(无水)[1]

2.55 g/cm3(三水合物)[1]

熔点 280 °C(无水)[1]

75 °C(三水合物分解)[1]

溶解性 44.3 g/100 g(20 °C)[1]
溶解性 微溶于乙醇[1]
结构
晶体结构 单斜
危险性
主要危害 神经毒剂,可能的人体致癌物
NFPA 704
1
3
0
 
闪点 不可燃
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

乙酸铅,又稱醋酸鉛,是一种白色晶体状化合物,带味,过去曾称为铅糖[2]。和其他铅化合物一样,乙酸铅也有很大毒性。乙酸铅能溶于甘油。和水中形成三水合物,Pb(CH3COO)2·3H2O,是一种无色或白色花状单斜晶体。 低濃度的乙酸鉛在漸進式染髮產品中的主要有效成份[3]。由於乙酸铅具有甜味,過去它曾被用作糖替代品[4]。後來由於人們發現乙酸铅具有毒性,因此乙酸铅後來被禁止用於生产甜味剂[5]克勉二世曾因乙酸铅中毒而去世。[6]

製備

[编辑]

铅黄一氧化铅)和乙酸反应可以制备乙酸铅。

亦可將乙酸過氧化氫共沸製備。反應式如下: Pb(s) + H2O2(aq) + 2 H+(aq) → Pb2+(aq) + 2 H2O(l)
Pb2+(aq) + 2 CH3COO(aq) → Pb(CH3COO)2(aq)

參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 CRC Handbook of Chemistry and Physics 97th Edition. 2016-06-24: 4–68. ISBN 1-4987-5428-7 (英语). 
  2. ^ Nicholas Wade. 地球身世之謎. 知書房出版集團. 2004: p.159 [2013-07-15]. ISBN 9578320477. (原始内容存档于2014-07-14). 
  3. ^ 存档副本. [2018-05-15]. (原始内容存档于2018-04-25). 
  4. ^ "The Disturbingly Long History of Lead Toxicity in Winemaking."页面存档备份,存于互联网档案馆Anna Archibald, 30 July 2020. Retrieved: 22 December, 2020.
  5. ^ Stoeppler, M., Hazardous Metals in the Environment, Techniques and Instrumentation in Analytical Chemistry 12, Elsevier: 60, 1992, ISBN 9780080875606, From the results achieved so far it is obvious that the purity law for lead in wines in the last two centuries was frequently ignored. 
  6. ^ Specht, W. and Fischer, K. (1959). "Vergiftungsnachweis an den Resten einer 900 Jahre alten Leiche" [Evidence of poisoning in the remains of a 900-year-old corpse] (in German). Archiv für Kriminologie 124: 61–84.
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乙酸铅
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