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 |
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 |