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