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. 325.60158 - Maximum allowable concentrations for substances; I to M

Current through Vol. 24-12, July 15, 2024
Rule 8. Table 4 for substances I to M, are as
						follows:
TABLE 4
MAXIMUM ALLOWABLE CONCENTRATIONS FOR
									 SUBSTANCES; I TO M
SUBSTANCE
CAS No.1
MAC/Ceiling/STEL
ppm
mg/m3
Indene
95-13-6
10
45
Indium and compounds (as In)
7440-74-6
---
0.1
C
Iodine
7553-56-2
0.1
1
Iron oxide fume
1309-37-1
---
10
Iron salts, soluble (as Fe)
Varies with compound
---
1
Isoamyl acetate
123-92-2
100
525
Isoamyl alcohol
123-51-3
100
360
Isobutyl acetate
110-19-0
150
700
Isobutyl alcohol
78-83-1
100
300
Isophorone
78-59-1
25
140
Isopropyl acetate
108-21-4
250
950
Isopropyl alcohol
67-63-0
400
980
Isopropylamine
75-31-0
5
12
Isopropyl ether
108-20-3
500
2,100
Isopropyl glycidyl ether (IGE)
4016-14-2
50
240
Kaolin
Inert dust
Ketene
463-51-4
0.5
0.9
Lead and lead compounds
See CS 603. Lead Exposure in
									 Construction*
Limestone
1317-65-3
Inert dust
S
Lindane
58-89-9
---
0.5
Lithium hydride
7580-67-8
---
0.025
L.P.G. (Liquified petroleum gas)
68476-85-7
1,000
1,800
Magnesite
546-93-0
Inert dust
Magnesium oxide fume
1309-48-4
15
S
Malathion
121-75-5
---
15
Maleic anhydride
108-31-6
0.25
1
C
Manganese and compounds (as Mn)
7439-96-5
---
5
Marble
1317-65-3
Inert dust
S
Mercury
7439-97-6
---
0.1
S
Mercury (organic compounds)
Varies with compound
---
0.01
Mesityl oxide
141-79-7
25
100
Methane
Inert gas
Methanethiol
See Methyl mercaptan
Methoxychlor
72-43-5
---
15
2-Methoxyethanol
See Methyl cellosolve
Methyl acetate
79-20-9
200
610
Methyl acetylene (propyne)
74-99-7
1,000
1,650
Methyl acetylene-propadiene mixture
									 (MAPP)
-
1,000
1,800
S
Methyl acrylate
96-33-3
10
35
Methylal (dimethoxymethane)
109-87-5
1,000
3,100
Methyl alcohol (methanol)
67-56-1
200
260
Methylamine
74-89-5
10
12
Methyl amyl alcohol
See Methyl isobutyl carbinol
Methyl (n-amyl) ketone (2-heptanone)
110-43-0
100
465
S, C
Methyl bromide
74-83-9
20
80
Methyl butyl ketone
See 2-Hexanone
S
Methyl cellosolve
109-86-4
25
80
S
Methyl cellosolve acetate
110-49-6
25
120
C
Methyl chloride
74-87-3
100
210
Methyl chloroform
71-55-6
350
1,900
Methylcyclohexane
108-87-2
500
2,000
Methylcyclohexanol
25639-42-3
100
470
S
o-Methylcyclohexanone
583-60-8
100
460
Methylenedianiline (MDA)
See CS 605. Methylenedianiline (MDA) in
									 Construction*
Methyl ethyl ketone (MEK)
See 2-Butanone
Methyl formate
107-31-3
100
250
S
Methyl iodide
74-88-4
5
28
Methyl isoamyl ketone
110-12-3
100
475
S
Methyl isobutyl carbinol
108-11-2
25
100
Methyl isobutyl ketone
See Hexone
S
Methyl isocyanate
624-83-9
0.02
0.05
Methyl mercaptan
74-93-1
0.5
1
Methyl methacrylate
80-62-6
100
410
Methyl propyl ketone
See 2-Pentanone
C
Methyl silicate
681-84-5
5
30
C
alpha-Methyl styrene
98-83-9
100
480
C
Methylene bisphenyl isocyanate (MDI)
101-68-8
0.02
0.2
Methylene chloride (dichloromethane)
See OH 313. Methylene Chloride*
Molybdenum
Soluble compounds
7439-98-7
---
5
Insoluble compounds
---
15
S
Monomethyl aniline
100-61-8
2
9
S, C
Monomethyl hydrazine
60-34-4
0.2
0.35
S
Morpholine
110-91-8
20
70
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).
*
Caution--these rules contain extensive
									 requirements for exposure to these substances.
All MIOSHA Standards shown in this table are
									 referenced in
									 R
									 325.60151.