PP Plastic Cups

"Can PP plastic cups be washed and reused as is?"

Depends which PP you're referring to. Cup, or contents.

Depends which country you're in.

Depends if your country inspects for such things.

Depends.........................

Generally speaking yes, if the cups have not been used to store anything hazardous. Plain soap and water should be sufficient.

as of now, we are using a chlorine solution for washing of our unused pp plastic cups.

the ratio is 1gram chlorine : 1 kilo gram of distilled water.

is it safe enough?

we rinsed it twice with distilled water as to remove properly the odor of chlorine.