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The photochemical bromination can be speeded up by using additional lighting. Under the lights used for the video the bromine colour disappeared in a couple of minutes.
Materials:
| Hexane (20 cm3) | 2% bromine in hexane (1 cm3) |
| 0.1% bromine water (2 cm3) | Liquid paraffin (4 cm3) |
| Aluminium oxide (5 g) | Glass wool |
| Bright light or sunlight | Glass or plastic trough |
| Test tube | Delivery tube |
| Test tubes and bungs (3) | Dropping pipette |
| Bunsen burner | Heat-proof mat |
| Laboratory jack or substitute | Glass rod and scissors |