S-8666 is an orally active uricosuric antihypertensive diuretic. The S-8666 has both S-(-)- and R-(+)-isomers. The diuretic and sodium-excretion activities of it are entirely dominated by the S-(-)-isomer, while the R-(+)-isomer shows no significant activity. S-8666 relies on the organic acid transport system to be secreted through the proximal tubule. S-8666 exhibits a clear uric acid excretion-promoting activity and diuretic effect in various species (such as rats and chimpanzees).

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.