Indophenol

Indophenol
Names
	IUPAC name 4-(4-hydroxyphenyl)iminocyclohexa-2,5-dien-1-one
	Other names Benzenoneindophenol, phenolindophenol
Identifiers
CAS Number	500-85-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	9951 ;
ECHA InfoCard	100.007.194
PubChem CID	10379;
UNII	BW444H326B ;
CompTox Dashboard (EPA)	DTXSID2075425 ;
	InChI InChI=1S/C12H9NO2/c14-11-5-1-9(2-6-11)13-10-3-7-12(15)8-4-10/h1-8,14H Key: RSAZYXZUJROYKR-UHFFFAOYSA-N ; InChI=1/C12H9NO2/c14-11-5-1-9(2-6-11)13-10-3-7-12(15)8-4-10/h1-8,14H Key: RSAZYXZUJROYKR-UHFFFAOYAS;
	SMILES O=C/2/C=C\C(=N\c1ccc(O)cc1)\C=C\2;
Properties
Chemical formula	C12H9NO2
Molar mass	199.209 g·mol−1
Appearance	Reddish-blue powder
Melting point	above 300 °C
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). verify (what is ?) Infobox references

Indophenol is an organic compound with the formula OC₆H₄NC₆H₄OH. It is deep blue dye that is the product of the Berthelot's reaction, a common test for ammonia.^[2] The indophenol group, with various substituents in place of OH and various ring substitutions, is found in many dyes used in hair coloring and textiles.^[3]

Indophenol is used in hair dyes, lubricants, redox materials, liquid crystal displays, fuel cells and chemical-mechanical polishing. It is an environmental pollutant and is toxic to fish.^[1]^[4]

Berthelot test

In the Berthelot test (1859), a sample suspected of having containing ammonia is treated with sodium hypochlorite and phenol. The formation of indophenol is used to determine ammonia and paracetamol by spectrophotometry.^[5] Other phenols can be used. Dichlorophenol-indophenol (DCPIP), a form of indophenol, is often used to determine the presence of vitamin C (ascorbic acid).^[6]

Related compounds

Indophenol blue is a different compound with systematic name N-(p-dimethylaminophenyl)-1,4-naphthoquinoneimine.^[7]

References

^ ^a ^b ^c ^d Sabnis, R. W. (2007). Handbook of Acid-Base Indicators. CRC Press. p. 196. ISBN 978-0-8493-8219-2.
^ Patton, Charles J.; Crouch, S. R. (1977). "Spectrophotometric and kinetics investigation of the Berthelot reaction for the determination of ammonia". Analytical Chemistry. 49 (3): 464–469. doi:10.1021/ac50011a034.
^ Horst Berneth (2002). "Azine Dyes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_213.pub2. ISBN 978-3527306732.
^ "Indophenol I5763". 500-85-6. Retrieved 2020-06-11.
^ Tsuboi, T.; Hirano, Y.; Shibata, Y.; Motomizu, S. (2002). "Sensitivity improvement of ammonia determination based on flow-injection indophenol spectrophotometry with manganese(II) ion as a catalyst and analysis of exhaust gas of thermal power plant". Analytical Sciences. 18 (10): 1141–4. PMID 12400662.
^ Hughes, David Emlyn (1983). "Titrimetric Determination of Ascorbic Acid with 2,6-Dichlorophenol Indophenol in Commercial Liquid Diets". Journal of Pharmaceutical Sciences. 72 (2): 126–129. doi:10.1002/jps.2600720208.
^ Graham, S. O. (1963). "Indophenol Blue as a Chromogenic Agent for Identification of Halogenated Aromatic Hydrocarbons". Science. 139 (3557): 835–836. Bibcode:1963Sci...139..835G. doi:10.1126/science.139.3557.835.

Zdroj:https://en.wikipedia.org?pojem=Indophenol
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[b1-1] Sabnis, R. W. (2007). Handbook of Acid-Base Indicators. CRC Press. p. 196. ISBN 978-0-8493-8219-2.

[2] Patton, Charles J.; Crouch, S. R. (1977). "Spectrophotometric and kinetics investigation of the Berthelot reaction for the determination of ammonia". Analytical Chemistry. 49 (3): 464–469. doi:10.1021/ac50011a034.

[3] Horst Berneth (2002). "Azine Dyes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_213.pub2. ISBN 978-3527306732.

[4] "Indophenol I5763". 500-85-6. Retrieved 2020-06-11.

[5] Tsuboi, T.; Hirano, Y.; Shibata, Y.; Motomizu, S. (2002). "Sensitivity improvement of ammonia determination based on flow-injection indophenol spectrophotometry with manganese(II) ion as a catalyst and analysis of exhaust gas of thermal power plant". Analytical Sciences. 18 (10): 1141–4. PMID 12400662.

[6] Hughes, David Emlyn (1983). "Titrimetric Determination of Ascorbic Acid with 2,6-Dichlorophenol Indophenol in Commercial Liquid Diets". Journal of Pharmaceutical Sciences. 72 (2): 126–129. doi:10.1002/jps.2600720208.

[7] Graham, S. O. (1963). "Indophenol Blue as a Chromogenic Agent for Identification of Halogenated Aromatic Hydrocarbons". Science. 139 (3557): 835–836. Bibcode:1963Sci...139..835G. doi:10.1126/science.139.3557.835.

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