Safety & Loss Prevention
Z-Table
University of Wisconsin System Administration
29 CFR Ch. XVII (7-1-92 Edition)
Table Z-1-A -- Limits for Air Contaminants
| TRANSITIONAL LIMITS | FINAL RULE LIMITS** | ||||||||||
| PEL* | TWA | STEL (c) | CEILING | ||||||||
| SUBSTANCE | CAS NO (f) | ppm(a) | mg/m3(b) | SKIN | ppm(a) | mg/m3(b) | ppm(a) | mg/m3(b) | ppm(a) | mg/m3(b) | SKIN |
| Naphtha (Coal tar) | 8030-30-6 | 100 | 400 | 100 | 400 | ||||||
| Naphthalene | 91-20-3 | 10 | 50 | 10 | 50 | 15 | 75 | ||||
| alpha-Naphthylamine;See 1910.1004 | 134-32-7 | ||||||||||
| beta-Naphthylamine; See 1910.1009 | 91-59-8 | ||||||||||
| Nickel carbonyl (as Ni) | 13463-39-3 | 0.001 | 0.007 | 0.001 | 0.007 | ||||||
| Nickel, metal and insoluble compounds (as Ni) | 7440-02-0 | 1 | 1 | ||||||||
| Nickel, soluble compounds (as Ni) | 7440-02-0 | 1 | 0.1 | ||||||||
| Nicotine | 54-11-5 | 0.5 | X | 0.5 | X | ||||||
| Nitric acid | 7697-37-2 | 2 | 5 | 2 | 5 | 4 | 10 | ||||
| Nitric oxide | 10102-43-9 | 25 | 30 | 25 | 30 | ||||||
| p-Nitroaniline | 100-01-6 | 1 | 6 | X | 3 | X | |||||
| Nitrobenzene | 98-95-3 | 1 | 5 | X | 1 | 5 | X | ||||
| p-Nitrochlorobenzene | 100-00-5 | 1 | X | 1 | X | ||||||
| 4-Nitrodiphenyl; See 1910.1003 | 92-93-3 | ||||||||||
| Nitroethane | 79-24-3 | 100 | 310 | 100 | 310 | ||||||
| Nitrogen dioxide | 10102-44-0 | (C)5 | (C)9 | 1 | 1.8 | ||||||
| Nitrogen trifluoride | 7783-54-1 | 10 | 29 | 10 | 29 | ||||||
| Nitroglycerin(l) | 55-63-0 | (C)0.2 | (C)2 | X | 0.1(l) | X | |||||
| Nitromethane | 75-52-5 | 100 | 250 | 100 | 250 | ||||||
| 1-Nitropropane | 108-03-2 | 25 | 90 | 25 | 90 | ||||||
| 2-Nitropropane | 79-46-9 | 25 | 90 | 10 | 35 | ||||||
| N-Nitrosodimethylamine; See 1910.1016 | 62-79-9 | ||||||||||
| Nitrotoluene | o-isomer 88-72-2; m-isomer 99-08-1; p-isomer 99-99-0 | 5 | 30 | X | 2 | 11 | X | ||||
| Nitrotrichloromethane;See Chloropicrin | |||||||||||
| Nonane | 111-84-2 | 200 | 1050 | ||||||||
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