o-Cresolphthalein          

CAS No.: 596-27-0

Synonyms: 3,3-Bis (4-hydroxy-3-methyl phenyl)-1-(3H)-iso-benzofuranone; Di-o-cresol phthalide; 3´-Dimethylphenolphthalein; OCP.

Molecular formula: C22H18O4

Molecular weight: 346.38

Property : Colorless crystal or white, light yellow powder. Solubility in ethanol, less solubility in water.. mp 223C. λ max 566 (381)nm.

Range of PH: 8.2 ~ 9.8 (from colorless to red)

Main use: acid-base indicator.

Solubility test in ethanol: pass