Im starting to get confused now, this is not the only webpage it mentions this, and this is from the CDC. But I also found a link that says that Bacillus Subtillus spores are
hydrogen peroxide resistant. Maybe the problem is not that it doesnt kill them but that it takes a while and the less concentrated it is the longer it takes
Microbicidal Activity.
Hydrogen peroxide is active against a wide range of microorganisms, including bacteria, yeasts, fungi, viruses, and spores 78, 654.
In an investigation of 3%, 10%, and 15%
hydrogen peroxide for reducing spacecraft bacterial populations, a complete kill of 106 spores (i.e.,
Bacillus species) occurred with a 10% concentration and a 60-minute exposure time. A 3% concentration for 150 minutes killed 106 spores in six of seven exposure trials 658. A 10%
hydrogen peroxide solution resulted in a 103 decrease in
B. atrophaeus spores, and a ≥105 decrease when tested against 13 other pathogens in 30 minutes at 20°C 659, 660. A 3.0%
hydrogen peroxide solution was ineffective against VRE after 3 and 10 minutes exposure times 661 and caused only a 2-log10 reduction in the number of
Acanthamoeba cysts in approximately 2 hours 662. A 7% stabilized
hydrogen peroxide proved to be sporicidal (6 hours of exposure), mycobactericidal (20 minutes), fungicidal (5 minutes) at full strength, virucidal (5 minutes) and bactericidal (3 minutes) at a 1:16 dilution when a quantitative carrier test was used 655.
Guideline for Disinfection and Sterilization in Healthcare Facilities (2008)
www.cdc.gov