Pyrophorics (GHS codes H232 & H250):
NaH
NaBH4
LiAlH4
organo-lithium reagents (butyllithium, tert-butyllithium, and phenyllithium)
Grignard reagents (R-Mg-Cl & R-Mg-Br)



Potentially fatal by skin contact (GHS code H310):
hydrofluoric acid
ammonium fluoride
ammonium bifluoride
sodium bifluoride
potassium bifluoride
sodium cyanide
tetramethylammonium hydroxide
sodium azide