I haven’t seen anything on storage other than do not store calcium hypochlorite in metal or near metal. You should always wear a duct mask safety glasses and gloves when handling.
Made the mistake of storing a small plastic container of chlorine tablets for the pool above my washing machine in the laundry room. Had to replace all the hinges for the cabinet it was in. They were all corroding. Didn't take it long, one summer, and that was it. Everything went outside after that.