Into Learning The Breathtaking Chemistry The Most Of The World （three）

5. The deadliest synthetic chemicals

Of the 75 known dioxins, the most deadly are 2, 3, 7, 8-tetrachlorodibenzo-p-dioxins, which are 15,000 times more toxic than cyanide.

6. The most magnetic substance

The maximum energy output of Ndfeb Nd2Fe14B is 280 kJ/m3 (the so-called energy output is the maximum energy that a magnet can provide at a particular operating point).

7. The most powerful nerve gas

In 1952, the British Chemical Defense Laboratory at Portdown, Wiltshire, developed a highly potent gas. The substance is 300 times more toxic than phosgene gas used in World War I. The substance can be lethal at an airborne density of 10 mg/cubic meter, and the minimum dose of oral lethal is 0.3 mg.