亜ヒ酸、亜砒酸

関: arsenic trioxide、arsenous

WordNet

street name for lysergic acid diethylamide (同)back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
having the characteristics of an acid; "an acid reaction"
relating to compounds in which arsenic is trivalent

PrepTutorEJDIC

酸性の / 酸味のある,すっぱい(sour) / (言葉・態度などが)厳しい,しんらつな / 酸 / すっぱいもの / 《俗》=LSD

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/01/13 20:08:09」(JST)

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Arsenous acid (or arsenious acid) is the inorganic compound with the formula H₃AsO₃. It is known to occur in aqueous solutions, but it has not been isolated as a pure material, although this fact does not detract from the significance of As(OH)₃.^[2]

Properties

As(OH)₃ is a pyramidal molecule consisting of three hydroxyl groups bonded to arsenic. The ¹H NMR spectrum of arsenous acid solutions consists of a single signal consistent with the molecule's high symmetry.^[3] In contrast, the nominally related phosphorus species H₃PO₃ mainly adopts the structure HPO(OH)₂; P(OH)₃ is a very minor equilibrium component of such solutions. The differing behaviors of the As and P compounds reflect a trend whereby high oxidation states are more stable for lighter members of main group elements than their heavier congeners.^[4]

Reactions

The preparation of As(OH)₃ involves a slow hydrolysis of arsenic trioxide in water. Addition of base converts arsenous acid to the arsenite ions [AsO(OH)₂]⁻, [AsO₂(OH)]²⁻, and [AsO₃]³⁻. The first pK_a is 9.2, As(OH)₃ is a weak acid.^[4] Reactions attributed to aqueous arsenic trioxide are due to arsenous acid and its conjugate bases.

Toxicology

Arsenic-containing compounds are highly toxic and carcinogenic. The anhydride form of arsenous acid, arsenic trioxide, is used as a herbicide, pesticide, and rodenticide.

References

^ ^a ^b ^c "NIOSH Pocket Guide to Chemical Hazards #0038". National Institute for Occupational Safety and Health (NIOSH).
^ Munoz-Hernandez, M.-A. (1994). "Arsenic: Inorganic Chemistry". In King, R. B. Encyclopedia of Inorganic Chemistry. Chichester: John Wiley & Sons.
^ Kolozsi, A.; Lakatos, A.; Galbács, G.; Madsen, A. Ø.; Larsen, E.; Gyurcsik, B. (2008). "A pH-Metric, UV, NMR, and X-ray Crystallographic Study on Arsenous Acid Reacting with Dithioerythritol" (pdf). Inorganic Chemistry 47: 3832–3840. doi:10.1021/ic7024439. PMID 18380458.
^ ^a ^b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.

"Arsenic trioxide". Retrieved January 29, 2006.

External links

Case Studies in Environmental Medicine - Arsenic Toxicity

UpToDate Contents

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1. 尿酸のバランス uric acid balance
2. 出産時の臍帯血酸塩基分析 umbilical cord blood acid base analysis at delivery
3. 妊娠中の葉酸補充 folic acid supplementation in pregnancy
4. ポルフィリン症：概要 porphyrias an overview
5. 疾患予防におけるビタミン補給 vitamin supplementation in disease prevention

English Journal

Photochemical transformation of an iron(iii)-arsenite complex in acidic aqueous solution.

Pozdnyakov IP1, Ding W, Xu J, Chen L, Wu F, Grivin VP, Plyusnin VF.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology.Photochem Photobiol Sci.2016 Mar 9;15(3):431-9. doi: 10.1039/c5pp00240k. Epub 2016 Feb 24.
Surface complexation between arsenious acid anions (As(iii)) and ferric (hydr)oxides in water is important for the transformation and transfer of inorganic arsenic species. The mechanisms of formation and the photochemistry of dissolved Fe(iii)-As(iii) complexes in acidic aqueous solution are still
PMID 26906644

[Clinical Value of Arsenous Acid for Treating Patients with Acute Promyelocytic Leukemia].

Duan LJ1, Li C1, Yang RY2.
Zhongguo shi yan xue ye xue za zhi / Zhongguo bing li sheng li xue hui = Journal of experimental hematology / Chinese Association of Pathophysiology.Zhongguo Shi Yan Xue Ye Xue Za Zhi.2015 Aug;23(4):994-8. doi: 10.7534/j.issn.1009-2137.2015.04.016.
OBJECTIVE: To explore the clinical value of arsenious acid (H3AsO3) for treating patients with acute promyelocytic leukemia (APL).METHODS: A total of 86 patients with APL were randomly divided into experimental group (43 cases) and control group (43 cases). The control group was treated by all trans
PMID 26314432

[Effectiveness of the program "School Milk" for the prevention of iodine deficiency].

Danilenko AL, Kamilov FKh, Mamtsev AN, Kozlov VN, Ponomarev EE.
Voprosy pitaniia.Vopr Pitan.2015;84(2):53-8.
Republic of Bashkortostan refers to iodine-deficient regions of Russia. The incidence of endemic multinodular goiter in 2012 in the Republic amounted to 33.2 per 100 thousand of the population. The purpose of the study is to evaluate the effectiveness of group iodine prophylaxis of schoolchildren th
PMID 26841556

Japanese Journal

ポリアミド系複合逆浸透膜/ナノろ過膜の活性層への亜ヒ酸の分配係数および活性層内拡散係数の算出

日本海水学会誌 = Bulletin of the Society of Sea Water Science, Japan 70(3), 186-195, 2016-06
NAID 40020873311

Removal of arsenious acid from sulfuric acidic solution using ultrasound oxidation and goethite

Jpn. J. Appl. Phys. 54(7S1), 07HE17, 2015-06-30
NAID 150000110878

P30 硫酸酸性坑廃水における亜砒酸の超音波酸化処理条件の検討(ポスターセッション)

ソノケミストリー討論会講演要旨集 (22), 81-82, 2013-10-25
NAID 110009732802

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リンク元	「arsenous」「亜砒酸」

「arsenous」

Arsenous acid
Names
	IUPAC name Arsorous acid
	Other names Arsenious acid; Arsenic oxide
Identifiers
CAS Number	13464-58-9
ChEBI	CHEBI:49900
ChemSpider	530
DrugBank	DB04456
Jmol interactive 3D	Image
PubChem	545
	InChI InChI=1S/AsH3O3/c2-1(3)4/h2-4H Key: GCPXMJHSNVMWNM-UHFFFAOYSA-N ; InChI=1/AsH3O3/c2-1(3)4/h2-4H Key: GCPXMJHSNVMWNM-UHFFFAOYAA ;
	SMILES O[As](O)O ;
Properties
Chemical formula	H3AsO3
Molar mass	125.94 g/mol
Appearance	Only exists in aqueous solutions
Hazards
Main hazards	Toxic, corrosive
	US health exposure limits (NIOSH):
PEL (Permissible)	[1910.1018] TWA 0.010 mg/m3
REL (Recommended)	Ca C 0.002 mg/m3 [15-minute]
IDLH (Immediate danger	Ca [5 mg/m3 (as As)]
Related compounds
Related compounds	Arsenic acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

　　[★]

亜ヒ酸の

関: arsenic trioxide、arsenious acid

「亜砒酸」

　　[★]

英: arsenious acid
関: 亜ヒ酸

[PGCH-1] "NIOSH Pocket Guide to Chemical Hazards #0038". National Institute for Occupational Safety and Health (NIOSH).

[2] Munoz-Hernandez, M.-A. (1994). "Arsenic: Inorganic Chemistry". In King, R. B. Encyclopedia of Inorganic Chemistry. Chichester: John Wiley & Sons.

[3] Kolozsi, A.; Lakatos, A.; Galbács, G.; Madsen, A. Ø.; Larsen, E.; Gyurcsik, B. (2008). "A pH-Metric, UV, NMR, and X-ray Crystallographic Study on Arsenous Acid Reacting with Dithioerythritol" (pdf). Inorganic Chemistry 47: 3832–3840. doi:10.1021/ic7024439. PMID 18380458.

[-4] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.

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arsenious acid