Indophenol

Indophenol

Names
IUPAC name 4-(4-hydroxyphenyl)iminocyclohexa-2,5-dien-1-one
Identifiers
CAS Number	500-85-6 Y
3D model (Jmol)	Interactive image
ChemSpider	9951 Y
ECHA InfoCard	100.007.194
PubChem CID	10379
InChI InChI=1S/C12H9NO2/c14-11-5-1-9(2-6-11)13-10-3-7-12(15)8-4-10/h1-8,14H Y Key: RSAZYXZUJROYKR-UHFFFAOYSA-N Y 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	199.21 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
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. 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.

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

Indophenol blue (CAS 132-31-0) is a different compound with systematic name N-(p-dimethylaminophenyl)-1,4-naphthoquinoneimine.