Description
| Parameter | Details |
|---|---|
| Chemical Name | o-Cresolphthalein (ortho-Cresolphthalein) |
| CAS Number | 76-50-6 |
| Chemical Formula | C22H18O4 |
| Molecular Weight | 346.38 g/mol |
| Appearance | White to pale pink crystalline powder |
| Solubility | Slightly soluble in water; soluble in ethanol, acetone, and alkaline solutions |
| Melting Point | 228–230 °C |
| Boiling Point | Decomposes before boiling |
Most Common Uses :
- Used as an acid-base pH indicator.
- Employed in laboratory titrations and chemical analysis.
- Used in calcium determination in clinical and industrial applications.
Storage Reccomendation :
- Store in a tightly closed container, in a cool, dry, and well-ventilated place. Protect from light and moisture.
Hazards :
- May cause skin, eye, and respiratory irritation.
- Harmful if ingested or inhaled.
- Handle with proper protective equipment.
Other Information :
-
- Changes color depending on pH (color transition: colorless to violet at pH ~8.2–9.8).
- Structurally related to phenolphthalein, another well-known pH indicator.
