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Guidelines for Developing Spacecraft Maximum Allowable Concentrations for Space Station Contaminants (1992) / Chapter Skim
Currently Skimming:

'HISTORICAL DEVELOPMENT OF LIMITS FOR TOXICANTS IN SPACECRAFT'
Pages 13-22

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 13...
... From the 200 possible contaminants, the panel identified compounds having significant hazard potential for which no submarine standards had been recommended and asked NASA to set priorities for chemicals of primary concern. NASA identified 11 compounds for which they desired long-term exposure limits; NASA also requested emergency limits for five compounds.
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From page 14...
... TABLE 1 90-Day Contaminant Concentration Limits8 Contaminant 90-Day Limit, mg/m3 Acetone 71 Acetylene 2,700 Ammonia 17 Benzene 3 Carbon monoxide 29 Chlorine 03 Dichlorodifluoromethane 5,000 l,l,2>Tetrafluoro-l,2-dichloroethane 7,000 Ethyl alcohol 115 Hydrogen 245 Hydrogen chloride 15 Hydrogen fluoride 0.1 Methane 3300 Methyl alcohol 13 Methyl chloroform 3,000 Monoethanolamine 1 Nitrogen dioxide 1 Ozone 0.04 Phosgene 0.2 Sulfur dioxide 2.6 Toluene 188 1,1,1-Trichloroethane 1,100 Xylene 217 "Adapted from NRC (1968)
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From page 15...
... COT established the Panel on Air Quality in Manned Spacecraft for this review, and provisional limits were recommended for 52 potential spacecraft contaminants for a variety of exposure durations (Table 4)
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From page 16...
... . bApplies to a single exposure during the mission.
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From page 17...
... lOMin, Special 60 Area Min 90 6 ALCOHOLS Days Mon Notes Methyl alcohol (32.04)
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From page 18...
... lOMin, Special 60 Area Min 90 * Mon KETONES Days Notes Acetone (58.08)
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From page 19...
... Area 60 90 6 HALOGENATED ALIPATHICS Min Days Mon Notes Chloroform -- (11939)
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From page 20...
... lOMin, Special Area 60 90 6 AROMAT1CS (continued) Min Days Mon Notes 1,3,5-Trimethylbenzene (120.12)
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From page 21...
... Area Min Days Mon Notes INORGANICS (continued) Hydrogen fluoride, gas -- 5.0 0.1 0.1 (20.0)
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Key Terms

  • molecular weight
  • days mon
  • mon notes
  • space science
  • emergency limits

  • min days
  • provisional limits
  • provisional emergency
  • methyl alcohol
  • spacecraft contaminants

  • limits recommended
  • panel recommended
  • hydrogen fluoride
  • carbon monoxide
  • animal models

  • compound special
  • esters methyl
  • continuous exposure
  • methyl chloroform
  • exposure durations

  • min provisional
  • recommended exposure
  • ketones days
  • alipathics min
  • notes acetone

  • mon ketones
  • term limits
  • methyl acetate
  • requested emergency
  • provisional guidelines


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