Should we totally ban bleach in the Blood Bank to avoid destruction of the S antigen? We have some scut buckets to which we add bleach as a disinfectant and I can't decide how much I should worry that a splash will end up somewhere that it could affect the S antigen in a test. It seems fairly remote but if it happened on a patient with an undetected anti-S it would be bad. If I could find a suitable alternative to add to the scut buckets, then I could switch to that and not have to wonder. If you don't use bleach in your scut buckets what do you add in hopes of killing viruses etc.?