Spacecraft Maximum Allowable Concentrations for Selected Airborne Contaminants

The National Aeronautics and Space Administration (NASA) has developed spacecraft maximum allowable concentrations (SMACs) for contaminants that might be found in the atmosphere within spacecraft during space missions to ensure the health and well-being of astronauts traveling and working in this unique environment. In volume 1 of this series, NASA developed SMACs for 11 compounds: acetaldehyde, ammonia, carbon monoxide, formaldehyde, Freon 113, hydrogen, methane, methanol, octamethyltrisiloxane, trimethylsilanol, and vinyl chloride. Volume 2 includes SMACs for 12 more airborne contaminants: acrolein, benzene, carbon dioxide, 2-ethoxyethanol, hydrazine, indole, mercury, methylene chloride, methyl ethyl ketone, nitromethane, 2-propoanol, and toluene. In developing SMACs from the toxicological literature, NASA followed the Guidelines for Developing Spacecraft Maximum Allowable Concentrations for Space Station Contaminants published in 1992 by the National Research Council. Table of Contents Front Matter Spacecraft Maximum Allowable Concentrations for Selected Airborne Contaminants Appendix A Appendix B: Reports on Spacecraft Maximum Allowable Concentrations for Selected Airborne Contaminants B1 Acrolein B2 Benzene B3 Carbon Dioxide B4 2-Etoxyethanol B5 Hydrazine B6 Indole B7 Mercury B8 Methylene Chloride B9 Methyl Ethyl Ketone B10 Nitromethane B11 2-Proponol B12 Toluene