What is the most toxic substance in the world?

Answer 1

It's a toxin produced by a bacterium...

Botulinum toxin is the most acutely toxic substance known, with a lethal dose of about 200-300 picogram of toxin per kg of bodyweight. It is the toxic compound produced by the bacterium Clostridium botulinum.

A picogram is One-trillionth (1x10-12 or 0.000000000001) of a gram. This means that 100 grams would be enough to kill all human beings on earth.

Ralph Nader, noted environmental activist, once claimed that plutonium was "the most toxic substance known to mankind", but this is not correct.

Polonium (for example) is more toxic than Plutonium. By mass, polonium-210 is around 250,000 times more toxic than hydrogen cyanide (the actual LD50 for Po is about 1 microgram for an 80 kg person, compared with about 250 milligrams for hydrogen cyanide)

Answer 2

In sense, ever thing in the world is toxic, until it is taken in the amount or the quantity that we need. Example; Ozone is a form oxygen and is highly poisonous, Caffeine is essential for our body to develop the memory power but in case if a person just takes in 10gm of caffeine at once, it's up-to the matter of his body that can hold. (i mean the man dies instantly after having it) They are the slow poison but here are some extreme fast poison

Botulinum Toxin A (less than 0.0005 gram can kill)

Dimethyl Mercury (CH3)2Hg

Ricin

Hydrogen Cyanide H-C≡N

V X nerve gas C11H26NO2PS

Answer 3

im not sure if its most potent but potassium cyanide is very assessable, and easily made with some research

I'm pretty sure it's a cesium isotope. I seem to recall it's more toxic than plutonium.

Answer 4

Fluorine is the most universally toxic chemical element. This element can damage the eyes, nose, lungs, liver, and kidneys. It can even cause death at a relatively low concentration.