Emergency and Continuous Exposure Limits for Selected Airborne Contaminants Volume 2

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Emergency and Continuous Exposure Limits for Selected Airborne Contaminants Volume 2 (1984)
Board on Environmental Studies and Toxicology (BEST)

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. "Summary." Emergency and Continuous Exposure Limits for Selected Airborne Contaminants Volume 2. Washington, DC: The National Academies Press, 1984.

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Emergency and Continuous Exposure Limits for Selected Airborne Contaminants: Volume 2

Substance	Duration of Exposure	Previous Recommendations		Current Recommendations
Substance	Duration of Exposure	Year	Limit	Current Recommendations
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