''o''-Cresolphthalein

o-Cresolphthalein
Names
	IUPAC name 3,3-Bis(4-hydroxy-3-methylphenyl)-1(3H)-isobenzofuranone
Identifiers
CAS Number	596-27-0;
3D model (JSmol)	Interactive image;
Beilstein Reference	5-18-04-00193
ChEMBL	ChEMBL1443546;
ChemSpider	62217;
ECHA InfoCard	100.008.985
EC Number	209-881-8
PubChem CID	68995;
UNII	XOU2D9049G;
	InChI InChI=1S/C22H18O4/c1-13-11-15(7-9-19(13)23)22(16-8-10-20(24)14(2)12-16)18-6-4-3-5-17(18)21(25)26-22/h3-12,23-24H,1-2H3 Key: CPBJMKMKNCRKQB-UHFFFAOYSA-N;
	SMILES CC1=C(C=CC(=C1)C2(C3=CC=CC=C3C(=O)O2)C4=CC(=C(C=C4)O)C)O;
Properties
Chemical formula	C22H18O4
Molar mass	346.38 g·mol−1
Appearance	White powder
Melting point	223 °C (433 °F; 496 K)
Solubility in water	Insoluble
Solubility	Soluble in ethanol
Acidity (pKa)	9.61
Hazards
GHS pictograms
GHS signal word	Warning
GHS hazard statements	H302, H312, H315, H319, H332, H335, H351
GHS precautionary statements	P201, P202, P261, P264, P270, P271, P280, P281, P301+312, P302+352, P304+312, P304+340, P305+351+338, P308+313, P312, P321, P322, P330, P332+313, P337+313, P362, P363, P403+233, P405, P501
Related compounds
Related compounds	Phenolphthalein; Thymolphthalein
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

o-Cresolphthalein is a pH indicator used in titrations. It is insoluble in water but soluble in ethanol. Its solution is colourless below pH 8.2, and purple above 9.8.

Cresolphthalein (pH indicator)
below pH 8.2		above pH 9.8
8.2	⇌	9.8

References

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.