| The pink colour spreads upwards until, after about an hour, all the phenolphthalein solution is pink. |
| Dissolve 1 g phenolphthalein in 50 ml ethanol and add 50 ml deionised water while stirring continuously. |
| Turn the vial upside down and make sure that the phenolphthalein solution does not leak out of the vial. |
| If you tell a computer to add two drops of phenolphthalein indicator to a flask, it does not err. |
| The listing is based on findings from feeding studies of phenolphthalein that caused cancer in multiple organs in multiple species of experimental animals. |
| The spaces must be large enough for ammonia molecules to move through into the phenolphthalein solution. |
