potassium* 
					
					
					     . . . metal
					
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					4.3
  DHS
  CW
					 
		        
		         
  
		         Hazardous Chemical
		        
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					I
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						2257
						
							
						
							
							   7440-09-7
							
						
					
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					Toxic if ingested or if in contact with skin. Reacts violently with water to form hydrogen gas which usually ignites or explodes; reacts with traces of moisture to form hydrogen gas which can explode if ignited; forms yellow crusty oxide layer which is explosive and may detonate when cut. 
BANNED CHEMICAL IN DET SCHOOLS. 
Reacts violently with many chemicals; surface coating of potassium hydroxide is corrosive to skin and eyes; reacts with water to form highly corrosive potassium hydroxide; store under hydrocarbon liquids, tightly sealed to prevent entry of air and moisture. Can be destroyed safely by reaction with 2-methylpropan-2-ol. Sodium or lithium are safer alternatives. 
				
					 4 
						
							
									
											
												
												
												
												
												
													See also METALS, ACTIVE,
												
											
												
												
												
												
												
													 REDUCTANTS
												
											
												
												
												
												
												
													
													
													
													
													
													
													
													
													
													
													
													
												 and Appendix H.
												
											
									
						
						
						
					
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