Environmental health and safety office

Pyropyhoric Chemicals

Listed below are several classes of readily oxidized chemicals which can ignite spontaneously in air. Pyrophoric chemicals (within DDC hazard class designations 08 and 09), usually denoted by `PYR' in comments of the Chemical Registry, should be stored in tightly closed containers under an inert atmosphere and any handling of them should be carried out under an inert atmosphere or liquid as well.

CAUTION: Do not attempt to open a container of a Pyrophoric chemical!

Due to their highly reactive characteristics, contact UMD EHSO at 726-6764 for special instructions concerning their handling and packaging.

Table 5-3 Pyrophoric Chemicals

Grignard reagents, RMgX
Metal alkyls and aryls, RLi, RNa, R3Al, R2Zn, e.g. trimethyl aluminum
Metal carbonyls, such as Ni(CO)4, Fe(CO)5, Co2 (CO)8
Alkali metals such as Na, K
Metal powders, such as Al, Co, Fe, Mg, Mn, Pd, Pt, Ti, Sn, Zn, Zr
Metal hydrides, such as NaH, LiAlH4
Nonmetal hydrides, such as B2H6 and other boranes, PH3, AsH3
Nonmetal alkyls, such as R3B, R3P, R3As
Phosphorus (white)