The amount of burn chemical often ranges from about 1 percent to about 15 percent, preferably about 5 to about 10 percent, based on {TAIL ~ the total weight} of {HEAD ~ the formulation} 
The amount of burn chemical often ranges from about 1 percent to about 15 percent , preferably about 5 to about 10 percent , based on { TAIL ~ the total weight } of { HEAD ~ the formulation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD