4-(Chloromethyl)-7-hydroxycoumarin (compound 4) is a hydroxycoumarin derivative with potent antioxidant effect and high hydroxyl radical-scavenging property. 4-(Chloromethyl)-7-hydroxycoumarin contains a methyl group and a chlorine group in the heterocyclic ring. A series of coumarins incorporating hydroxy-, chloro- and/or chloromethyl-moieties has been investigated as potent inhibitors of the zinc enzyme carbonic anhydrase, expecially tumor-associated isoforms CA IX and XII.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.