2,2'-Biphenol

2,2′-Biphenol
Names
	Preferred IUPAC name [1,1′-Biphenyl]-2,2′-diol
	Other names o,o′-Dihydroxybiphenyl
Identifiers
CAS Number	1806-29-7;
3D model (JSmol)	Interactive image;
Beilstein Reference	1638363
ChEBI	CHEBI:28970;
ChEMBL	ChEMBL183874;
ChemSpider	14959;
ECHA InfoCard	100.015.730
EC Number	217-303-0;
Gmelin Reference	51261
KEGG	C03209;
PubChem CID	15731;
UNII	PM2R53I3C9;
CompTox Dashboard (EPA)	DTXSID6051809 ;
	InChI InChI=1S/C12H10O2/c13-11-7-3-1-5-9(11)10-6-2-4-8-12(10)14/h1-8,13-14H Key: IMHDGJOMLMDPJN-UHFFFAOYSA-N;
	SMILES C1=CC=C(C(=C1)C2=CC=CC=C2O)O;
Properties
Chemical formula	C12H10O2
Molar mass	186.210 g·mol−1
Appearance	white solid
Melting point	109 °C (228 °F; 382 K)
Boiling point	320 °C (608 °F; 593 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H315, H318, H319, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

2,2′-Biphenol is an organic compound with the formula (C₆H₄OH)₂. It is one of three symmetrical isomers of biphenol. A white solid, it is a precursor to diphosphite ligands that are used to support industrial hydroformylation catalysis.