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OCR for page 3
Emergency and Continuous Exposure Limits for Selected Airborne Contaminants: Volume 2
SUMMARY
Because this report deals with diverse substances, a conventional summary would be inappropriate. Table 1 summarizes previously recommended and currently recommended emergency exposure limits (EELs) for up to 24 h and continuous exposure limits (CELs) for 90 d for chemicals suggested for review by military sponsors of the Committee on Toxicology.
TABLE 1
Emergency and Continuous Exposure Limits
Substance
Duration of Exposure
Previous Recommendations
Current Recommendations
Year
Limit
Chlorine
60 min
24 h
90 d
1971
3 ppm
1 ppm
0.1 ppm
3 ppm
0.5 ppm
0.1 ppm
Chlorine trifluoride
10 min
30 min
60 min
1968
7 ppm
3 ppm
1 ppm
7 ppm
3 ppm
1 ppm
Ethanolamine
60 min
24 h
90 d
1967
50 ppm
3 ppm
0.5 ppm
50 ppm
3 ppm
0.5 ppm
Trichlorofluoromethane
(FC 11)
60 min
24 h
90 d
1966
30,000 ppm
20,000 ppm
1,000 ppm
1,500 ppm
500 ppm
100 ppm
Dichlorodifluoromethane
(FC 12)
60 min
24 h
90 d
1966
30,000 ppm
20,000 ppm
1,000 ppm
10,000 ppm
1,000 ppm
100 ppm
Dichlorofluoromethane
(FC 21)
60 min
24 h
90 d
—
—
—
—
100 ppm
3 ppm
1 ppm
Trichlorotrifluoroethane
(FC 113)
60 min
24 h
90 d
1969
1,500 ppm
200 ppm
100 ppm
1,500 ppm
500 ppm
100 ppm
Dichlorotetrafluoroethane
(FC 114)
60 min
24 h
90 d
1966
30,000 ppm
20,000 ppm
1,000 ppm
10,000 ppm
1,000 ppm
100 ppm
OCR for page 4
Emergency and Continuous Exposure Limits for Selected Airborne Contaminants: Volume 2
Substance
Duration of Exposure
Previous Recommendations
Current Recommendations
Year
Limit
Isopropyl alcohol
60 min
24 h
90 d
1966
400 ppm
200 ppm
50 ppm
400 ppm
200 ppm
1 ppm
Phosgene
60 min
24 h
90 d
1966
1 ppm
0.1 ppm
0.05 ppm
0.2 ppm
0.02 ppm
0.01 ppm
Sodium hydroxide
10 min
30 min
60 min
1965
4 mg/m3
4 mg/m3
2 mg/m3
2 mg/m3
2 mg/m3
2 mg/m3
Sulfur dioxide
10 min
30 min
60 min
24 h
90 d
1966
30 ppm
20 ppm
10 ppm
5 ppm
1 ppm
30 ppm
20 ppm
10 ppm
5 ppm
1 ppm
Vinylidene chloride
24 h
90 d
1966
25 ppm
2 ppm
10 ppm
0.15 ppm
Xylene
60 min
24 h
90 d
1966
200 ppm
100 ppm
50 ppm
200 ppm
100 ppm
50 ppm
Representative terms from entire chapter:
previous recommendations