<prompt> Nonoxynol 9 ?Is a chemical detergentIs a barrier contraceptiveCan be used repeatedly in a dayCan be used to prevent STIs  <response>: Ans. isai.e., Is a chemical detergentNonoxynol - 9Chemical detergent that damages the sperm cell membranes, killing the cells.It is a safe, effective contraceptive option for women at low risk of HIV STIs 