The amount of {HEAD ~ 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 
The amount of { HEAD ~ 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
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH 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