{HEAD ~ One phase}, amounting to 0.5 5.0 parts per 100 parts of the other phase, consists of {TAIL ~ an aqueous solution} of sodium hydroxide whose concentration is in the range of 25 to 55 percent by weight 
consists of
{ HEAD ~ One phase } , amounting to 0.5 5.0 parts per 100 parts of the other phase , consists of { TAIL ~ an aqueous solution } of sodium hydroxide whose concentration is in the range of 25 to 55 percent by weight
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH