Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › General Industry and Construction Safety and Occupational Health Standards › Occupational Health Standards › Part 601 - AIR CONTAMINANTS FOR CONSTRUCTION › Section R. 325.60159 - Maximum allowable concentrations for substances; N to P

Current through Vol. 24-12, July 15, 2024
Rule 9. Table 5 for substances N to P, are as
						follows:
TABLE 5
MAXIMUM ALLOWABLE CONCENTRATIONS FOR
									 SUBSTANCES; N TO P
SUBSTANCE
CAS No.1
MAC/Ceiling/STEL
ppm
mg/m3
Naphtha (coal tar)
8030-30-6
100
400
Naphtha (petroleum) (MAC will be based on
									 aromatic hydrocarbons in mixture)
Naphthalene
91-20-3
10
50
A
beta-Naphthylamine
91-59-8
---
Neon
Inert gas
Nickel carbonyl
13463-39-3
0.001
0.007
Nickel, metal and soluble compounds (as
									 Ni)
7440-02-0
---
1
S
Nicotine
54-11-5
---
0.5
Nitric acid
7697-37-2
2
5
Nitric oxide
10102-43-9
25
30
S
p-Nitroaniline
100-01-6
1
6
S
Nitrobenzene
98-95-3
1
5
S
p-Nitrochlorobenzene
100-00-5
---
1
Nitroethane
79-24-3
100
310
Nitrogen
Inert gas
Nitrogen dioxide
10102-44-0
5
9
Nitrogen trifluoride
7783-54-2
10
29
S
Nitroglycerin
55-63-0
0.2
2
Nitromethane
75-52-5
100
250
1-Nitropropane
108-03-2
25
90
2-Nitropropane
79-46-9
25
90
S, A
N-Nitrosodimethylamine
									 (dimethylnitroasomine)
62-75-9
---
S
Nitrotoluene
Varies with compound
5
30
Nitrotrichloromethane
See Chloropicrin
Nitrous oxide
Inert gas
S
Octachloronaphthalene
2234-13-1
---
0.1
Octane
111-65-9
400
1,900
Oil mist, particulate
8012-95-1
---
5
Oil mist, vapor (MAC will be based on aromatic
									 hydrocarbons in mixture)
Osmium tetroxide
20816-12-0
---
0.002
Oxalic acid
144-62-7
---
1
Oxygen difluoride
7783-41-7
0.05
0.1
Ozone
10028-15-6
0.1
0.2
S
Paraquat
1910-42-5
2074-50-2
4685-14-7
---
0.5
S
Parathion
56-38-2
---
0.1
Pentaborane
19624-22-7
0.005
0.01
S
Pentachloronaphthalene
1321-64-8
---
0.5
S
Pentachlorophenol
87-86-5
---
0.5
Pentaerythritol
115-77-5
Inert particulate
Pentane
109-66-0
500
1,500
2-Pentanone
107-87-9
200
700
Perchloroethylene
127-18-4
100
670
Perchloromethyl mercaptan
594-42-3
0.1
0.8
Perchloryl fluoride
7616-94-6
3
13.5
Petroleum distillates (naphtha)
(MAC will be based on aromatic hydrocarbons in
									 mixture)
S
Phenol
108-95-2
5
19
S
p-Phenylenediamine
101-84-8
---
0.1
Phenyl ether (vapor)
-
1
7
Phenyl ether-biphenyl mixture (vapor)
8004-13-5
1
7
Phenylethylene
See Styrene
Phenyl glycidyl ether (PGE)
122-60-1
10
60
S
Phenylhydrazine
100-63-0
5
22
S
Phosdrin (Mevinphos)
7786-34-7
---
0.1
Phosgene (carbonyl chloride)
75-44-5
0.1
0.4
Phosphine
7803-51-2
0.3
0.4
Phosphoric acid
7664-38-2
---
1
Phosphorus (yellow)
7723-14-0
---
0.1
Phosphorus pentachloride
10026-13-8
---
1
Phosphorus pentasulfide
1314-80-3
---
1
Phosphorus trichloride
7719-12-2
0.5
3
Phthalic anhydride
85-44-9
2
12
S
Picric acid
88-89-1
---
0.1
Pival (2-pivalyl-1,3-indandione)
83-26-1
---
0.1
Plaster of Paris
26499-65-0
Inert dust
Platinum, soluble salts (as Pt)
7440-06-4
---
0.002
Polytetrafluoroethylene decomposition
									 products
See Teflon® decomposition products
Propane
74-98-6
Inert gas
S
Propargyl alcohol
107-19-7
1
---
A
beta-Propiolactone
57-57-8
---
n-Propyl acetate
109-60-4
200
840
Propyl alcohol
71-23-8
200
500
n-Propyl nitrate
627-13-4
25
110
Propylene dichloride
78-87-5
75
350
S
Propylene imine
75-55-8
2
5
Propylene oxide
75-56-9
100
240
Propyne
See Methyl acetylene
Pyrethrum
8003-34-7
---
5
Pyridine
110-86-1
5
15
1
The CAS number is for information only.
									 Enforcement is based on the substance name. For an entry covering more than 1
									 metal compound measured as the metal, the CAS number for the metal is given -
									 not the CAS number for the individual compounds.
A
See
									 R
									 325.60154(2)(a).
C
See
									 R
									 325.60154(2)(b).
S
See
									 R
									 325.60154(2)(c).
STEL
See
									 R
									 325.60154(2)(d).
All MIOSHA Standards shown in this table are
									 referenced in
									 R
									 325.60151.