3.6.1.1	inorganic diphosphatase	-	
3.6.1.10	endopolyphosphatase	-	
3.6.1.11	exopolyphosphatase	-	
3.6.1.12	dCTP diphosphatase	-	
3.6.1.13	ADP-ribose diphosphatase	-	
3.6.1.14	adenosine-tetraphosphatase	-	
3.6.1.15	nucleoside-triphosphate phosphatase	-	
3.6.1.16	CDP-glycerol diphosphatase	-	
3.6.1.17	bis(5'-nucleosyl)-tetraphosphatase (asymmetrical)	-	
3.6.1.18	FAD diphosphatase	-