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Wikipedia:WikiProject Chemicals/Chembox validation/VerifiedDataSandbox and Naphthazarin: Difference between pages

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Saving copy of the {{chembox}} taken from revid 476909080 of page 5,8-Dihydroxy-1,4-naphthoquinone for the Chem/Drugbox validation project (updated: '').
 
 
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{{ambox | text = This page contains a copy of the infobox ({{tl|chembox}}) taken from revid [{{fullurl:5,8-Dihydroxy-1,4-naphthoquinone|oldid=476909080}} 476909080] of page [[5,8-Dihydroxy-1,4-naphthoquinone]] with values updated to verified values.}}
{{chembox
{{chembox
| Verifiedfields = changed
| verifiedrevid = 413275419
| verifiedrevid =
| ImageFile = Naphthazarin.svg
| ImageFile = Naphthazarin.svg
| ImageSize = 130
| ImageSize = 130
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| ImageSize1 = 180
| ImageSize1 = 180
| ImageName1 = Ball-and-stick model
| ImageName1 = Ball-and-stick model
| IUPACName = 5,8-dihydroxynaphthalene-1,4-dione
| = 5,8--1,4-dione
| OtherNames = Dihydroxynaphthoquinone
| OtherNames = Dihydroxynaphthoquinone
| Section1 = {{Chembox Identifiers
|Section1={{Chembox Identifiers
| InChI = 1/C10H6O4/c11-5-1-2-6(12)10-8(14)4-3-7(13)9(5)10/h1-4,11-12H
| InChI = 1/C10H6O4/c11-5-1-2-6(12)10-8(14)4-3-7(13)9(5)10/h1-4,11-12H
| InChIKey = RQNVIKXOOKXAJQ-UHFFFAOYAN
| InChIKey = RQNVIKXOOKXAJQ-UHFFFAOYAN
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| ChEMBL_Ref = {{ebicite|correct|EBI}}
| ChEMBL_Ref = {{ebicite|correct|EBI}}
| ChEMBL = 274056
| ChEMBL = 274056
| ChEBI_Ref = {{ebicite|changed|EBI}}
| ChEBI = 28849
| EINECS = 207-495-4
| KEGG = C01938
| UNII = S9IX5I5C0K
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/C10H6O4/c11-5-1-2-6(12)10-8(14)4-3-7(13)9(5)10/h1-4,11-12H
| StdInChI = 1S/C10H6O4/c11-5-1-2-6(12)10-8(14)4-3-7(13)9(5)10/h1-4,11-12H
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = RQNVIKXOOKXAJQ-UHFFFAOYSA-N
| StdInChIKey = RQNVIKXOOKXAJQ-UHFFFAOYSA-N
| CASNo_Ref = {{cascite|correct|??}}
| CASNo_Ref = {{cascite||}}
| CASNo =
| CASNo =
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 9735
| ChemSpiderID = 9735
| PubChem = 10141
| PubChem = 10141
| SMILES = C1=CC(=C2C(=O)C=CC(=O)C2=C1O)O }}
| SMILES = C1=CC(=C2C(=O)C=CC(=O)C2=C1O)O }}
| Section2 = {{Chembox Properties
|Section2={{Chembox Properties
| C=10|H=6|O=4
| Formula = C<sub>10</sub>H<sub>6</sub>O<sub>4</sub>
| MolarMass = 190.15 g/mol
| Appearance =
| Appearance =
| Density =
| Density =
| MeltingPt =
| =
| BoilingPt =
| BoilingPt =
| Solubility = }}
| Solubility = }}
| Section3 = {{Chembox Hazards
|Section3={{Chembox Hazards
| GHSPictograms = {{GHS07}}
| GHSSignalWord = Warning
| HPhrases = {{H-phrases|302|312|315|319|332|335}}
| PPhrases = {{P-phrases|261|264|270|271|280|301+312|302+352|304+312|304+340|305+351+338|312|321|322|330|332+313|337+313|362|363|403+233|405|501}}
| MainHazards =
| MainHazards =
| FlashPt =
| FlashPt =
| Autoignition = }}
| = }}
}}
}}

'''Naphthazarin''', often called '''5,8-dihydroxy-1,4-naphthoquinone''' or '''5,8-dihydroxy-1,4-naphthalenedione''' ([[IUPAC]]), is a naturally occurring<ref name=thomson71>Thomson R.H. Naturally Occurring Quinones. Academic Press, London (1971). Quoted by Khalafy and Bruce.</ref><ref name=thomson87>Thomson R.H. Naturally Occurring Quinones III. Chapman and Hall, London (1987). Quoted by Khalafy and Bruce.
</ref> [[organic compound]] with formula {{chem|C|10|H|6|O|4}}, formally derived from [[1,4-naphthoquinone]] through replacement of two [[hydrogen]] atoms by [[hydroxyl]] (OH) groups. It is thus one of many [[dihydroxynaphthoquinone]] [[structural isomer]]s.

Naphthazarin is soluble in [[1,4-dioxane]] from which it crystallizes as deep red needles that melt at 228−232&nbsp;°C.<ref name=khalafy/>

== Synthesis ==
Naphtharazin can be prepared by condensation of [[1,4-dimethoxybenzene]] with [[2,3-dichloromaleic anhydride]] followed by reductive [[dechlorination]] and re[[oxidation]].<ref name=lewis>Lewis J.R. and Paul J.J.(1977). Z. Naturforsch., B, 32: 1473. Quoted by Khalafy and Bruce.</ref><ref name=huot>Huot R. and Brassard P. (1974). Can. J. Chem., 52: 838. Quoted by Khalafy and Bruce.</ref>

Naphtharazin can also be obtained by oxidation of [[5,8-dihydroxy-1-tetralone]] with [[manganese dioxide]] (MnO<sub>2</sub>).<ref name=khalafy>J. Khalafy and J.M. Bruce (2002), ''Oxidative dehydrogenation of 1-tetralones: Synthesis of juglone, naphthazarin, and α-hydroxyanthraquinones''. Journal of Sciences, Islamic Republic of Iran, volume 13 issue 2, pages 131-139.</ref>

== References ==
{{reflist}}

[[Category:1,4-Naphthoquinones]]
[[Category:Hydroquinones]]
[[Category:Hydroxynaphthoquinones]]
[[Category:3-Hydroxypropenals within hydroxyquinones]]