Blister Agents HN-1HN-2HN-3 Nitrogen Mustards

CAS ID#: 538-07-8, 000051-75-2, 000555-77-1

Affected Organ Systems: None

Cancer Classification:  Please contact NTP, IARC, or EPA with questions on cancer and cancer classification.

Chemical Classification: Warfare and Terrorism Agents (used in acts of war or terror)

Summary: Nitrogen mustards (HN-1, HN-2, HN-3) are colorless to yellow, oily liquids that evaporate very slowly. HN-1 has a faint, fishy or musty odor. HN-2 has a soapy odor at low concentrations and a fruity odor at higher concentrations. HN-3 may smell like butter almond. Although nitrogen mustards could be used in chemical warfare, there are presently no records of such use. HN-1 has been used to remove warts in the past, and HN-2 has been used sparingly in chemotherapy.