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砷酸二氢钠
	IUPAC名; Sodium dihydrogen arsenate
别名	砷酸一钠
识别
CAS号	10103-60-3 ; 13466-04-1（一水）
PubChem	23677060
SMILES	O[As](=O)(O)[O-].[Na+];
InChI	1S/AsH3O4.Na/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+1/p-1;
InChIKey	XCVRTGQHVBWRJB-UHFFFAOYSA-M
性质
化学式	H2AsNaO4
摩尔质量	163.92 g·mol−1
外观	无色晶体
密度	2.53 g·cm−3
溶解性（水）	可溶
危险性
主要危害	高毒
相关物质
其他阴离子	磷酸二氢钠
其他阳离子	砷酸二氢钾
相关化学品	砷酸氢二钠; 砷酸钠
	若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

砷酸二氢钠是一种无机化合物，化学式为NaH₂AsO₄，它是砷酸的钠盐之一，可用于制备砷酸。^[2]

制备

砷酸二氢钠可由65wt%砷酸溶液和氢氧化钠稀溶液反应得到。^[1]

H₃AsO₄ + NaOH → NaH₂AsO₄ + H₂O

反应

砷酸二氢钠的硝酸溶液和四氯化锡的乙酸溶液以2.4:1在室温反应，可以得到Sn(HAsO₄)₂·2.7H₂O。^[3]它和五氧化二砷加热反应，可以得到无色晶体Na₇As₁₁O₃₁。^[4]

它和邻菲啰啉在含少量盐酸的水溶液中结晶，可以得到无色晶体NaH₂AsO₄·C₁₂H₈N₂·1.5H₂O。^[5]

参考文献

^ ^1.0 ^1.1 Ring, Joseph; Lindenthal, Lorenz; Weil, Matthias; Stöger, Berthold. Crystal structure of sodium dihydrogen arsenate. Acta Crystallographica Section E Crystallographic Communications. 25 September 2017, 73 (10): 1520–1522 [2022-08-31]. PMC 5730308 . PMID 29250371. doi:10.1107/S2056989017013470. eISSN 2056-9890. （原始内容存档于2022-08-31）.
^ Giguari, N. Sh.; Rusiya, M. Sh.; Kasradze, Kh. F.; Paresheshvili, N. G.; Giguari, R. D. Synthesis of arsenic acid from alkali metal arsenates. Sakartvelos Mecnierebata Akademiis Macne, Kimiis Seria. 2007, 33 (2): 155–160 （格鲁吉亚语）. CODEN IANKEJ.
^ Shakshooki, S. K.; Arafa, E. A.; Siala, F. Y.; El-Mellah, M. A.; El-Hamruni, S. M.; Bejey, A. M.; Beshewa, F. H. Adsorption of some lanthanides on glassy tin arsenate. Journal of Radioanalytical and Nuclear Chemistry. May 1999, 240 (2): 435–436. ISSN 0236-5731. doi:10.1007/BF02349390. eISSN 1588-2780.
^ Guesmi, Abderrahmen; Nespolo, Massimo; Driss, Ahmed. Synthesis, crystal structure and charge distribution of Na₇As₁₁O₃₁: An oxygen-deficient layered sodium arsenate. Journal of Solid State Chemistry. August 2006, 179 (8): 2466–2471. ISSN 0022-4596. doi:10.1016/j.jssc.2006.04.010.
^ Harchani, Ali; Kaminsky, Werner; Haddad, Amor. Structure, Hirshfeld surface and theoretical study of a new inorganic organic arsenate compound NaH₂AsO₄·(C₁₂H₈N₂)·1.5H₂O. Journal of Molecular Structure. June 2019, 1186: 60–67. ISSN 0022-2860. doi:10.1016/j.molstruc.2019.03.018.

[Ring-1] 1.0 ^1.1 Ring, Joseph; Lindenthal, Lorenz; Weil, Matthias; Stöger, Berthold. Crystal structure of sodium dihydrogen arsenate. Acta Crystallographica Section E Crystallographic Communications. 25 September 2017, 73 (10): 1520–1522 [2022-08-31]. PMC 5730308 . PMID 29250371. doi:10.1107/S2056989017013470. eISSN 2056-9890. （原始内容存档于2022-08-31）.

[2] Giguari, N. Sh.; Rusiya, M. Sh.; Kasradze, Kh. F.; Paresheshvili, N. G.; Giguari, R. D. Synthesis of arsenic acid from alkali metal arsenates. Sakartvelos Mecnierebata Akademiis Macne, Kimiis Seria. 2007, 33 (2): 155–160 （格鲁吉亚语）. CODEN IANKEJ.

[3] Shakshooki, S. K.; Arafa, E. A.; Siala, F. Y.; El-Mellah, M. A.; El-Hamruni, S. M.; Bejey, A. M.; Beshewa, F. H. Adsorption of some lanthanides on glassy tin arsenate. Journal of Radioanalytical and Nuclear Chemistry. May 1999, 240 (2): 435–436. ISSN 0236-5731. doi:10.1007/BF02349390. eISSN 1588-2780.

[4] Guesmi, Abderrahmen; Nespolo, Massimo; Driss, Ahmed. Synthesis, crystal structure and charge distribution of Na₇As₁₁O₃₁: An oxygen-deficient layered sodium arsenate. Journal of Solid State Chemistry. August 2006, 179 (8): 2466–2471. ISSN 0022-4596. doi:10.1016/j.jssc.2006.04.010.

[5] Harchani, Ali; Kaminsky, Werner; Haddad, Amor. Structure, Hirshfeld surface and theoretical study of a new inorganic organic arsenate compound NaH₂AsO₄·(C₁₂H₈N₂)·1.5H₂O. Journal of Molecular Structure. June 2019, 1186: 60–67. ISSN 0022-2860. doi:10.1016/j.molstruc.2019.03.018.

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