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