In a human weighing 150 pounds, death occurs within two minutes of inhaling 70 milligrams (0.0025 oz) of hydrogen cyanide. For Zyklon B to form into a gas it needs to reach a temperature of 78 degrees. Zyklon B is also known as Hydrocyanic Acid that is absorbed in a granular shaped carrier substance and released through contact with air. On average it took fifteen minutes to kill everyone inside the gas chamber. These chambers were specifically made for the poison Zyklon B to kill someone in a short amount of time. Zyklon B was also used to kill lice in the clothing of prisoners. 195 kg of Zyklon B was used to kill 1,000,000 people. Zyklon B prevents the cells to receive oxygen and causes a person to die due to lack of oxygen.