Diacetolol is the major metabolite of the β-adrenoceptor blocking agent, acebutolol. In vitro, the β-adrenoceptor blocking potency of diacetolol was less than that of acebutolol but its cardioselectivity (atrial relative to tracheal tissue) was greater. Diacetolol had weak intrinsic sympathomimetic activity, and no significant membrane-stabilizing activity. It did not restore sinus rhythm to anaesthetized dogs with ouabain-induced arrhythmias but was similar to acebutolol in preventing arrhythmia induced by adrenaline/methylchloroform in anaesthetized cats. Study of diacetolol pharmacokinetics and bioavailability suggests either a first-pass effect or incomplete absorption of diacetolol after oral administration. Diacetolol plasma half-life after oral administration is about 12 h and is not dose-dependent. Diacetolol possesses significant antihypertensive action against moderate essential hypertension in man. Its antihypertensive effect is associated with a reduction in the heart rate and a decrease in plasma renin activity.

Phenarsone sulfoxylate (Aldarsone), a pentavalent arsenical, is a condensation product of 3-amino-4 hydroxylphenylarsonic acid with sodium formaldehyde sulfoxylate. It is an antiamoebic agent. Aldarsone has a spirochetal power superior to that of tryparsamide. Aldarsone may be used in conjunction with artificial fever therapy and penicillin therapy to improve the results in symptomatic syphilis of the central nervous system (neurosyphilis).

Guinea green B is an organosulfur stain. It is used as a dye for silk and wool fabrics and as a biological stain.