I can answer point 5, 6 since we manufacture DCP as an intermediate for some other product. The main raw materials for Chlorophenols are Chlorine and Phenol…
Chlorine is available at -ve or free if you are procuring from large suppliers directly. Caustic soda manufacturers are these days ready to dump Chlorine at sub zero price if there is a willing buyer ready to buy in large quantities.
As far as phenol is concerned most of the phenol is imported in india through Kandla port. the prices of phenol have been relatively stable while all other bulk chemicals prices have been surging recently.
Entry barrier is basically for a new player to come in and start a plant for chorophenols is difficult as its a potentially hazardous process considering the usage of chlorine. It is much easier for existing players to increase their capacities and get the necessary clearances since they have a proven track record.