Fulminic acid

Fulminic acid was discovered in 1824 by Justus von Liebig. The formula is H2C2N2O2, with the molecular formula being HCNO. This organic acid is an isomer of cyanic acid, discovered one year later by Friedrich Woehler. Fulminic acid and its salts are very dangerous, often used as detonators in explosives. The vapors are also toxic.