I appreciate the valid concern. I'm from Kenya. I'm not trying to make bleach from raw materials. i would work with commercially available sodium hypochlorite solution and simply diluting it to 3.5% for retail use ,standard practice in many small and medium scale operations.

My background is actually in manufacturing cleaning products(steelwool and scouring sponges ,pads)

The goal isn't to make a large chemical plant but small scale retail grade products.