砷酸钠
砷酸钠 | |
---|---|
IUPAC名 Sodium dihydrogen arsenate | |
别名 | sodium arsenate |
识别 | |
CAS号 | 13464-38-5(无水) 13510-46-8(十二水) |
PubChem | 47275 23622126 57348098 |
ChemSpider | 43027, 29325835 |
SMILES |
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InChI |
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InChIKey | CDBAKLRDFBGJOX-UHFFFAOYSA-K |
ChEBI | 84070 |
性质 | |
化学式 | Na3AsO4 |
摩尔质量 | 207.89 g·mol⁻¹ |
外观 | 无色固体 |
密度 | 1.517 g/cm3 (十二水) |
熔点 | 995~1,005 °C(1,268~1,278 K)(无水)[1] 60 °C(333 K)(十二水,分解)[1] |
溶解性(水) | 可溶 |
危险性 | |
GHS危险性符号 | |
GHS提示词 | 危险 |
H-术语 | H301, H331, H350, H410 |
P-术语 | P201, P202, P261, P264, P270, P271, P273, P281, P301+310, P304+340, P308+313, P311, P321, P330 |
主要危害 | 有毒 |
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。 |
砷酸钠是一种无机化合物,化学式为Na3AsO4。
制备
砷酸钠可由砷酸(或五氧化二砷[2])和氢氧化钠反应得到,从pH=11的溶液中可析出十二水合物:
- H3AsO4 + 3 NaOH → Na3AsO4 + 3 H2O
或由偏亚砷酸钠在水中经过氧化钠氧化得到。[3]它也可以从红砷镍矿中用硝酸钠和氢氧化钠提取出来:[4]
- 2 NiAs + 7 NaNO3 + 6 NaOH → 2 NiO + 2 Na3AsO4 + 7 NaNO2 + 3 H2O
参考文献
- Buketov, E. A.; Polukarov, A. N.; Isabaev, S. M.; Zhambekov, M. I. Thermal stability of sodium arsenates. Vestnik Akademii Nauk Kazakhskoi SSR, 1973. 29 (6): 30-33. ISSN: 0002-3213.
- Sagadieva, A. K.; Makhmetov, M. Zh.; Kozorin, L. G. Crystal hydrates of sodium arsenate (Na3AsO4). Zhurnal Neorganicheskoi Khimii, 1980. 25 (4): 1129-1132. ISSN: 0044-457X.
- Chavchanidze, N. G.; Giuashvili, I. I.; Ugulava, M. M.; Gigauri, R. D. Preparation of alkali metal arsenates. Zhurnal Neorganicheskoi Khimii, 1990. 35 (4): 1074-1076. ISSN: 0044-457X.
- Fester, G. A. Sodium arsenate from nickel arsenides. Rev. fac. ing. quim., 1956. 25: 143-151. CAN52: 10344.
- Kekenadze, M.; Rusia, M.; Kutsia, L.; Dzotsenidze, Z.; Gigauri, R. Synthesis and study of ammines of d-metals' (III) tetraoxoarsenates. Bulletin of the Georgian Academy of Sciences, 2000. 162 (2): 265-268. ISSN: 1560-0262.
- Bugenov, E. S.; Savel'ev, A. E. Mechanism of homogeneous reduction of arsenate ions with Formalin. Kompleksnoe Ispol'zovanie Mineral'nogo Syr'ya, 1979. 4: 22-28. ISSN: 0202-1382.
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