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NIOSH |
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NIOSH, abbreviation for National Institute for Occupational Safety and Health. NIOSH National Institute for Occupational Safety & Health, see there
NIOSH Recommendations for Safety & Health Standards
Agent NIOSH REL*/OSHA PEL† Health effects
Acetylene ≤2500 ppm/2500 ppm Asphyxia
Alkanes-octane 75 ppm (≤385 15 min)/500 ppm Skin, CNS
Ammonia 50 ppm/50 ppm Respiratory and ocular irritant
Benzene 0.1 ppm, TWA†† (< 1 ppm 15 min)/
1 ppm, TWA (<5 ppm 15 min) Leukemia
Carbon tetrachloride 2 ppm ceiling/20 ppm (100 ppm 30 min) Liver cancer
Chlorine 0.5 ppm (15 min)/1 ppm (15 min) Respiratory and ocular irritant
Ethylene oxide 0.1 TWA (5 ppm 10 min)/1 ppm TWA Mutations, leukemia, mesothelioma
Formaldehyde 0.16 ppm (1 ppm 15 min)/
1 ppm, TWA (2 ppm 15 min) Nasal cancer
Hydrogen cyanide 4.7 ppm (10 min ceiling)/10 ppm Blood, thyroid, respiratory effects
Hydrogen sulfide 10 ppm/20 ppm (50 ppm 10min) Irritation-CNS, respiratory effects
Methylene chloride As low as possible/500 ppm Cancer
(2000 ppm 5 min)
Nitric oxide 2 ppm/2ppm Dental erosion, nasal, lung irritation
Nitroglycerin 0.1 mg/m3 (20 min)/2 mg/m3 Circulatory effects
Phenol 5.2 ppm (15.6 15 min)/5 ppm Skin, eye, CNS, liver, kidney effects
Sulfuric acid 1 mg/m3/ 1 mg/m3 avoid skin & eye contact Pulmonary irritation
Toluene 100 ppm (200 ppm 10 min)/
200 ppm (500 ppm 10 min) CNS depression
Xylene 100 ppm (200 ppm 10 min)/100 ppm CNS depression, lung irritation
*Relative exposure limit
†Permissible exposure limit
††8 hr-time weighted average; all time values refer to 'ceiling' levels
Complete NIOSH table is available from Pubs Dissemination, Div Standards Development & Tech Transfer, NIOSH, 4676 Colombia Pkwy, 45226 ☎ 1.513.533.8287
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