The chlorine or {HEAD ~ other soluble material} within {TAIL ~ the bag} or sachet is dissolved or subjected to a leaching action in the liquid 
The chlorine or { HEAD ~ other soluble material } within { TAIL ~ the bag } or sachet is dissolved or subjected to a leaching action in the liquid
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH