The active ingredient, peracetic acid, from Sigma Aldrich is US$210 for 500 mL, or $95.90 for 100 mL, or $74.50 for 5 mL, as a 32% solution, not including shipping. https://www.sigmaaldrich.com/US/en/search/79-21-0?focus=products&gclid=CjwKCAjwp8OpBhAFEiwAG7NaEgRXwyIxJG5FAzd934VPMdZV8tC8B_uPewnP7Q8vV48MS6OVIO19DhoCj-IQAvD_BwE&page=1&perpage=30&sort=relevance&term=79-21-0&type=cas_number