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
This article is issued from Wikipedia - version of the 10/15/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.