Indophenol

Indophenol
	IUPAC name 4-(4-hydroxyphenyl)iminocyclohexa-2,5-dien-1-one
Identifiers
CAS number	500-85-6
PubChem	10379
ChemSpider	9951
Jmol-3D images	Image 1
	SMILES O=C/2/C=C\C(=N\c1ccc(O)cc1)\C=C\2 ;
	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 ;
Properties
Molecular formula	C12H9NO2
Molar mass	199.21 g mol−1
	(verify) (what is: /?); Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
	Infobox references

Indophenol is an artificial blue metachromatic dye, obtained by the action of phenol on certain nitrogenous derivatives of quinone.^[1] Indophenol resembles the color indigo in appearance. Dichlorophenol-indophenol (DCPIP), a form of indophenol, is often used to determine the presence of vitamin C, or ascorbic acid.^[2]

The formation of indophenol is used to determine ammonia and paracetamol by spectrophotometry.^[3]

Indophenol blue (CAS 132-31-0) is a completely different molecule with systematic name N-(p-dimethylaminophenyl)-1,4-naphthoquinoneimine.^[4]

References [edit]

^ Definition of indophenol from Dictionary.com
^ Ascorbic acid and indophenol
^ Tsuboi, T.; Hirano, Y.; Shibata, Y.; Motomizu, S.: 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, October 2002, Vol. 18, pp. 1141/4
^ Systematic name of idophenol blue

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