Preparation and stability of peracetic acid: https://www.thevespiary.org/rhodium/Rhodium/pdf/peracid.pdf (https://www.thevespiary.org/rhodium/Rhodium/pdf/peracid.pdf)
75% of peracetic acid prepared from 90% H2O2 remains intact after storage at room temp for seven weeks. If 100ppm of sodium pyrophosphate was added, 93% of the peracetic acid kept for seven weeks.
Performic acid decays within days.