Dynamite is an explosive material based on the explosive potential of nitroglycerin, initially using diatomaceous earth (kieselgur: United States spelling; kieselguhr: UK spelling) or another absorbent substance such as sawdust as an absorbent. It was invented by Swedish chemist and engineer Alfred Nobel in Krümmel (Geesthacht, Schleswig-Holstein, Germany), and patented in 1867. Military dynamite achieves greater stability by avoiding nitroglycerin.
It is usually sold in the form of a stick 20 centimetres (roughly 8 inches) long and 2.5 centimetres (1 inch) in diameter, but other sizes also exist. Dynamite is considered a high explosive, which means it detonates rather than deflagrates. While TNT is used as the standard for gauging explosive power, dynamite actually has more than 60% greater energy density than TNT.