Spores are disinfected by?

Formaldehyde is markedly bactericidal and sporicidal and has lethal effect on viruses. It is used to preserve anatomical specimens, and for destroying anthrax spores in hair and wool. Formaldehyde vapor, an effective environmental decontaminant under conditions of high humidity, is sometimes used to decontaminate laboratory rooms that have been accidentally and extensively contaminated with pathogenic bacteria, including those such as the anthrax bacillus that form resistant spores. Ethylene oxide sterilization is used for heat-labile materials. Ref: Ray C.G., Ryan K.J. (2010). Chapter 3. Sterilization, Disinfection, and Infection Control. In C.G. Ray, K.J. Ryan (Eds), Sherris Medical Microbiology, 5e