{HEAD ~ The amount} of {TAIL ~ 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 
of
{ HEAD ~ The amount } of { TAIL ~ 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
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH