{HEAD ~ The amount} of preservative often ranges from {TAIL ~ about 0.01 percent} to about 0.3 percent, preferably about 0.5 percent, based on the total weight of the formulation 
{ HEAD ~ The amount } of preservative often ranges from { TAIL ~ about 0.01 percent } to about 0.3 percent , preferably about 0.5 percent , based on the total weight of the formulation
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH