o-Cresolphthalein
Names | |
---|---|
IUPAC name
3,3-Bis(4-hydroxy-3-methylphenyl)-1(3H)-isobenzofuranone | |
Identifiers | |
596-27-0 | |
5-18-04-00193 | |
ChemSpider | 62217 |
ECHA InfoCard | 100.008.985 |
Properties | |
C22H18O4 | |
Molar mass | 346.38 g·mol−1 |
Appearance | White powder |
Melting point | 223 °C (433 °F; 496 K) |
Insoluble | |
Solubility | Soluble in ethanol |
Acidity (pKa) | 9.61 |
Hazards | |
S-phrases | S22-S24/25 |
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
- http://www.sciencelab.com/msds.php?msdsId=9923574
- http://www.chemicaldictionary.org/dic/O/o-Cresolphthalein_1298.html
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