Abstract
O-tolidine reagent can be used to successfully indicate the presence of chlorine in water. The reagent should preferably be at or below pH 1.3. The o-tolidine test could be used to test industrial processed water and for swimming pools. O-tolidine is toxic therefore should be used with care. A number of drops of the o-tolidine reagent should be placed into a test tube of water. If the water is chlorinated it will turn yellow after around five minutes. Copyright © 1998 Association for Science Education.
| Original language | English |
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| Pages (from-to) | 111-112 |
| Journal | School Science Review |
| Volume | 79 |
| Issue number | 289 |
| Publication status | Published - Jun 1998 |