Chemicals such as arsenic, strychnine, corrosive sublimate, aconitum and prussic acid were all used. Prussian blue lent its name to prussic acid (hydrogen cyanide) derived from it. Hydrogen cyanide, traditionally called "prussic acid", is volatile and quickly dissipates when heated. She committed suicide by taking prussic acid (known today as hydrogen cyanide). Long suddenly collapses and Pyne theorises that the cigarette contained prussic acid. At Auschwitz clothes infested with lice were treated with crystallised prussic acid. Millet does not contain prussic acid, which can be in sorghum. In 1815, Gay-Lussac deduced Prussic acid's chemical formula. Unable to meet his vast liabilities, he committed suicide by taking Prussic acid. In fact, he set about the distillation of laurel water (which contained prussic acid). Nevertheless, Holmes receives a bottle of prussic acid from Mrs. Ronder two days later. She took her own life by taking prussic acid. The knot is also seen spelled incorrectly as "prussic". Due to the pronunciation, the word is often misspelled Prussik, Prussick, or Prussic.