... & eco-friendly 5.quality guarantee ISO9001 POTASSIUM MONOPERSULFATE COMPOUNDWaste water treatment chemical Less dosage, Continuous long term activity. High efficacy for 99 ... 10 minutes4) Independently proven effective on porous surfaces such as wood, against organic challenge, in hard water and at low ... powder. Potassium Monopersulfate compound,chlorine free, Eco-friendly, water treatment chemical