Usually the digestive enzymes stay in one part of the pancreas. But if these enzymes leak into other parts of the pancreas, they can irritate it and cause pain and swelling. This may happen suddenly or over many years. Over time, it can damage and scar the pancreas.
Mustard was made in Dijon with hand-operated grinding mills until the middle of the 19th century, when one of the city's most famous sons, moutardier Maurice Grey, invented a steam-driven machine that could crush the seeds, remove the husks, and grind the remains to a fine powder in one operation.
Sulfur mustard was originally assigned the name LOST, after the scientists Wilhelm Lommel and Wilhelm Steinkopf, who developed a method of large-scale production for the Imperial German Army in 1916. Mustard agents are regulated under the 1993 Chemical Weapons Convention.