None to boiling.
Vapor is heavier than air and can cause suffocation by reducing the available oxygen for breathing.
Liquid contact will irritate eyes and may cause conjunctivitis. Single-dose toxicity is low to moderate. If vomiting does occur, the liquid can be aspirated into the lungs, which can cause chemical pneumonia and systemic effects. Human psychotropic, gastrointestinal, and central nervous system effects are possible. Remove to fresh air.