| When dark colored oils or fats are being titrated it is often difficult to obtain a good end point with phenolphthalein. |
| The listing is based on findings from feeding studies of phenolphthalein that caused cancer in multiple organs in multiple species of experimental animals. |
| The non-osmotic laxatives, phenolphthalein and senna, partly act by stimulating secretory mechanisms in the intestine. |
| Dissolve the residue in neutral alcohol and titrate with standard alkali using phenolphthalein as an indicator. |
| Turn the vial upside down and make sure that the phenolphthalein solution does not leak out of the vial. |
| Mould growth, on the other hand, is most vigourous in media that are strongly acid to phenolphthalein. |
