Final answer:
The standard level for endotoxin levels is determined by AOAC. 59 out of 60 replicates must show no growth to achieve a passing result, and the test results must be repeatable. Disinfectant manufacturers validate their products' efficacy claims through use-dilution tests.
Step-by-step explanation:
The standard level for endotoxin levels is determined by the Association of Official Agricultural Chemists International (AOAC). According to AOAC, a passing result in endotoxin testing requires a minimum of 59 out of 60 replicates to show no growth. Additionally, the test results must be repeatable across different batches of disinfectant and when performed on different days.
Disinfectant manufacturers validate the efficacy claims for their products through use-dilution tests, as designated by the Environmental Protection Agency (EPA).