Phenolphthalein was withdrawn in Canada due to concerns with carcinogenicity in 1997.
Health hazard
⚠️ For information only; not a substitute for the official Safety Data Sheet (SDS).
Phenolphthalein was withdrawn in Canada due to concerns with carcinogenicity in 1997.
| Physical Description | Phenolphthalein appears as white or yellowish-white to pale orange fine crystalline powder. Odorless. Aqueous solution is acidic. Colorless to pH 8.5; pink to deep-red above pH 9. Colorless in pres… |
| Color/Form | White or yellowish-white minute, triclinic crystals, often twinned |
| Odor | ODORLESS |
| Melting Point | 496 to 504 °F (NTP, 1992) |
| Density | 1.299 at 77 °F (NTP, 1992) - Denser than water; will sink |
| Solubility | less than 1 mg/mL at 66 °F (NTP, 1992) |
| Vapor Pressure | 6.7X10-13 mm Hg @ 25 °C /Estimated/ |
| Stability/Shelf Life | Stable in air. |
| IUPAC Name | 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one |
| Molecular Formula | C20H14O4 |
| Molecular Weight | 318.3 g/mol |
| CAS | 77-09-8 |
| SMILES | C1=CC=C2C(=C1)C(=O)OC2(C3=CC=C(C=C3)O)C4=CC=C(C=C4)O |
| InChIKey | KJFMBFZCATUALV-UHFFFAOYSA-N |
| Catalog No | KC.1610110 |
| Pack sizes | 25GM · 100GM · 500GM |
⚠️ For information only; not a substitute for the official SDS.