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Spacecraft Maximum Allowable Concentrations for Selected Airborne Contaminants, Volume 5
End Point
Exposure Data
Species and Reference
Uncertainty Factors
Acceptable Concentrations
Species
Small n
1 h
24 h
7 d
30 d
180 d
Hyperventilation
Tolerability
NOAEL at 2%, 24 h/d, 11 or 30 d
Human (n = 4, 4, 6) (Sinclair et al. 1969; Radziszewski et al. 1988; Guillerm and Radziszewski 1979)
—
10/(14)½
—
—
0.7
0.7
0.7
Exercise impairment
NOAEL at 2%, 24 h/d, 5, 15, or 30 d
Human (n = 6, 4, 6) (Glatte et al. 1967; Sinclair et al. 1971; Radziszewski et al. 1988)
