A dilute alcoholic solution of Brilliant Green (Viridis nitentis spirituosa) is a topical antiseptic, effective against gram-positive bacteria, also known under a Russian colloquial name zelyonka. If you grew up in the Soviet Union and ever had chicken pox, zelyonka turned you into a green-spotted leopard for at least a week: it’s hard to get it out of your skin. Brilliant green has, however, some serious safety issues: when ingested it can induce vomiting and contact with eyes can lead to grave injuries, even blindness. This is what a prominent Russian opposition leader Alexey Navalny...
