5. Sodium cyanide
Sodium cyanide is almost never used in a pleasant application and is mainly restricted as an industrial reactant. Accidental, or otherwise, exposure to this chemical results in death within seconds. The cyanide molecules bonds to cytochrome in your mitochondria which disables the cells. Lethal doses are around 200–300 mg.
The world had been using this for over a century is all sorts of products such as paints, pipes, and fuels, but just recently we its toxicity was disclosed to us. It might not lead to an instant death in small doses, but larger ones can be lethal.
Exposure can also lead to symptoms such as vomiting, weakness, seizures and coma. Lead poising occurs after an insidious long-term exposure, and is particularly dangerous for pregnant women and young children as hampers their neural development and has been attributed to impairment of children’s mental development and IQ.
Nicotine is a major part of cigarettes, the not so hidden killer that is attributed to causing cancer and tumors in millions of people. Besides the cigarettes, liquid nicotine can also be dangerous if absorbed through the skin and it enters the bloodstream. Exposure to over 30-60 mg can cause death within hours.
Digoxin is extracted from the foxglove plant, is usually used to treat heart conditions. But if not administered properly, it lives up to its notorious label of “Angel of Death.” An unfortunate example was where a serial killer Charles Cullen, used Digoxin at pharmaceutical grade to kill 40 heart patients!
1. Hydrogen peroxide
This might be one of the most dangerous chemicals out there. The good old fashioned bleach is found in every home at concentrations of around 3 to 6 percent. But the material is extremely volatile, which probably why it is also used as rocket propellant. At 70 percent concentrations, the chemical turns into lab grade one, where the slightest of nudges can trigger an explosion. A similar incident was observed when explosives used in attacks in London had hydrogen peroxide, which led to the death of 52 innocent people.