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