 Formulations containing chlorophenol are still available in the United Kingdom.In 1911, poisoning by drinking Lysol was the most common means of suicide in Australia and New York.One of the active ingredients, benzalkonium chloride, is highly toxic to fish (LC50 = 280 μg ai/L), very highly toxic to aquatic invertebrates (LC50 = 5.9 μg ai/L), moderately toxic to birds (LD50 = 136 mg/kg-bw), and slightly toxic ("safe") to mammals (LD50 = 430 mg/kg-bw).