WordNet
- a compound used as a fixing agent in photographic developing (同)sodium thiosulphate, sodium_thiosulfate
- 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"
PrepTutorEJDIC
- 定着液,ハイポ[hypo-sulfiteの短縮形]
- 皮下注射器[hypodermicの短縮形]
- 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
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/10/15 00:56:24」(JST)
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Chlorous acid
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Names |
IUPAC name
Chlorous acid
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Identifiers |
CAS Registry Number
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13898-47-0 N |
ChEBI |
CHEBI:29219 Y |
ChemSpider |
22861 Y |
InChI
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InChI=1S/ClHO2/c2-1-3/h(H,2,3) Y
Key: QBWCMBCROVPCKQ-UHFFFAOYSA-N Y
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InChI=1/ClHO2/c2-1-3/h(H,2,3)
Key: QBWCMBCROVPCKQ-UHFFFAOYAO
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Jmol-3D images |
Image |
KEGG |
C01486 Y |
PubChem |
24453 |
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Properties |
Chemical formula
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HClO2 |
Molar mass |
68.46 g/mol |
Acidity (pKa) |
1.96 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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N verify (what is: Y/N?) |
Infobox references |
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Chlorous acid is an inorganic compound with the formula HClO2. It is a weak acid. Chlorine has oxidation state +3 in this acid. The pure substance is unstable, disproportionating to hypochlorous acid (Cl oxidation state +1) and chloric acid (Cl oxidation state +5):
- 2 HClO2 → HClO + HClO3
Although the acid is difficult to obtain in pure substance, the conjugate base, chlorite, derived from this acid is stable. One example of a salt of this anion is the well-known sodium chlorite. This and related salts are sometimes used in the production of chlorine dioxide.
Preparation
HClO2 can be prepared through reaction of barium chlorite and dilute sulfuric acid:
- Ba(ClO2)2 + H2SO4 → BaSO4 + 2HClO2
Stability
Chlorous acid is a powerful oxidizing agent, although its tendency to disproportionation counteracts its oxidizing potential.
Chlorine is the only halogen to form an isolable acid of formula HXO2.[1] Neither bromous acid nor iodous acid has ever been isolated. A few salts of bromous acid, bromites, are known, but no iodites.[1]
References
Media related to Chlorous acid at Wikimedia Commons
- ^ a b Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
Hydrogen compounds
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- H3AsO3
- H3AsO4
- HAt
- HSO3F
- HBF4
- HBr
- HBrO
- HBrO2
- HBrO3
- HBrO4
- HCl
- HClO
- HClO2
- HClO3
- HClO4
- HCN
- HCNO
- H2CrO4/H2Cr2O7
- H2CO3
- H2CS3
- HF
- HFΟ
- HI
- HIO
- HIO2
- HIO3
- HIO4
- HMnO4
- H2MoO4
- HNC
- NaHCO3
- HNCO
- HNO
- HNO3
- H2N2O2
- HNO5S
- H3NSO3
- H2O
- H2O2
- H2O3
- H3PO2
- H3PO3
- H3PO4
- H4P2O7
- H5P3O10
- H2PtCl6
- H2S
- H2S2
- H2Se
- H2SeO3
- H2SeO4
- H4SiO4
- H2SiF6
- HSCN
- HNSC
- H2SO3
- H2SO4
- H2SO5
- H2S2O3
- H2S2O6
- H2S2O7
- H2S2O8
- CF3SO3H
- H2Te
- H2TeO3
- H6TeO6
- H4TiO4
- H2Po
- HCo(CO)4
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UpToDate Contents
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English Journal
- Antimicrobial activity and stability of weakly acidified chlorous acid water.
- Horiuchi I1, Kawata H, Nagao T, Imaohji H, Murakami K, Kino Y, Yamasaki H, Koyama AH, Fujita Y, Goda H, Kuwahara T.
- Biocontrol science.Biocontrol Sci.2015;20(1):43-51. doi: 10.4265/bio.20.43.
- The antimicrobial activity of weakly acidified chlorous acid water (WACAW) against Staphylococcus aureus, non-pathogenic Escherichia coli, enterohemorrhagic E. coli (EHEC O157:H7), Candida albicans, and spore-forming Bacillus and Paenibacillus species was evaluated in vitro. The antiviral activity w
- PMID 25817812
- S-oxygenation of thiocarbamides V: oxidation of tetramethylthiourea by chlorite in slightly acidic media.
- Chigwada T1, Mbiya W, Chipiso K, Simoyi RH.
- The journal of physical chemistry. A.J Phys Chem A.2014 Aug 7;118(31):5903-14. doi: 10.1021/jp504018k. Epub 2014 Jul 25.
- The reaction between tetramethylthiourea (TTTU) and slightly acidic chlorite has been studied. The reaction is much faster than comparable oxidations of the parent thiourea compound as well as other substituted thioureas. The stoichiometry of the reaction in excess oxidant showed a complete desulfur
- PMID 24922053
- Treatment with chlorous acid to inhibit spores of Alicyclobacillus acidoterrestris in aqueous suspension and on apples.
- Lee SY1, Ryu SR, Kang DH.
- Letters in applied microbiology.Lett Appl Microbiol.2010 Aug;51(2):164-9. doi: 10.1111/j.1472-765X.2010.02874.x. Epub 2010 May 20.
- AIM: To test the efficacy of a chemical (chlorous acid) for reducing the numbers of viable Alicyclobacillus acidoterrestris spores in laboratory media and on apples.METHODS AND RESULTS: Alicyclobacillus acidoterrestris spores in aqueous suspension and on apple surfaces of four different cultivars we
- PMID 20536710
Japanese Journal
- イオンクロマトグラフ法による飲料水及び次亜塩素酸ナトリウム溶液中の塩素酸の測定
- 塩化物イオン電極を用いる塩化物イオンと次亜塩素酸の逐次定量
- 堀 雅宏,小林 義隆
- 分析化学 32(2), 75-79, 1983-02-05
- 塩化銀固体膜電極を用いる直接電位差測定法と還元剤に過酸化水素水を用いる簡便な逐次定量法を確立した. 試料溶液に全イオン強度調整緩衝液(pH8)を加えて塩化物イオンを,次に過酸化水素水を加えて全塩化物イオンを定量する. 次亜塩素酸は両者の濃度差,あるいは塩化物イオン濃度と過酸化水素添加前後の宙什差の変化量とから求める. 共存する塩化物イオンと同様,次亜塩素酸も塩化物イオンの20分の1以上かつ200μ …
- NAID 110002904823
Related Links
- Chlorous acid is an inorganic compound with the formula HClO2. It is a weak acid. Chlorine has oxidation state +3 in this acid. The pure substance is unstable, disproportionating to hypochlorous acid (Cl oxidation state +1) and chloric acid ( Cl ...
Related Pictures
★リンクテーブル★
[★]
- 同
- hyp
- (化)より酸化状態?の低いという意味で使われている
[★]
- 関
- hypochlorite、hypochlorous
[★]
クロロ、塩化
- 関
- chloride