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Substancearrow down CAS Number(s)arrow down Health Factorsarrow down
MCPA 94-74-6 X
MCPP 93-65-2 X
MICP    
MOCAP 13194-48-4  
Machette 23184-66-9 X
Magnesite (Respirable Fraction) 13717-00-5;
546-93-0		 X
Magnesite (Total Dust) 13717-00-5;
546-93-0 (Magnesium carbonate) 		X
Magnesium 7439-95-4 X
Magnesium Oxide Fume (Total Particulate)
 1309-48-4 X
Malathion (Total Dust) 121-75-5 X
Malbranchea species   X
Maleic Acid 110-16-7  
Maleic Anhydride 108-31-6 X
Maneb 12427-38-2 X
Manganese Compounds (as Mn) 7439-96-5 X
Manganese Fume (as Mn) 7439-96-5 X
Manganese Cyclopentadienyl Tricarbonyl (as Mn) 12079-65-1 X
Manganese Tetroxide (as Mn) 1317-35-7 X
Marble (Respirable Fraction) 1317-65-3 X
Marble (Total Dust) 308068-21-5;
1317-65-3 (Marble, OSHA/NIOSH) 		X
Materials Examination    
Mavrik 69409-94-5  
Maximum Normalized dP/dt, Kst    
Melamine 108-78-1 X
Melengestrol Acetate 2919-66-6  
Menadione 58-27-5 X
Mercaptoethanol 60-24-2  
Mercury (Aryl and Inorganic) (as Hg) 7439-97-6 X
Mercury (organo) Alkyl Compounds (as Hg)   X
Mercury (Vapor) (as Hg) 7439-97-6 X
Mesityl Oxide 141-79-7 X
Mestranol 72-33-3  
Metalworking Fluid - microorganisms    
Methacrylic acid 79-41-4 X
Methamidophos 10265-92-6  
Methamphetamine 51-57-0 (Benzeneethanamine, N-alpha-dimethyl-, hydrochloride);
537-46-2 (Benzeneethanamine, N-alpha-dimethyl-, (alpha S)-);
7632-10-2 (Benzeneethanamine, N-alpha-dimethyl-);
33817-09-3 (Benzeneethanamine, N-alpha-dimethyl-, (alpha R)-) 		X
Metham Sodium 137-42-8  
Methane 74-82-8 X
Methanesulfonic acid 75-75-2 X
Methidathion 950-37-8  
Methomyl 16752-77-5 X
Methotrexate 59-05-2 X
3-Methoxy-n-butyl Acetate 4435-53-4  
Methoxychlor (Total Dust) 72-43-5 X
2-Methyoxyethanol 109-86-4 X
2-Methyoxyethyl acetate 110-49-6 X
Methoxyflurane 76-38-0 X
4-Methoxy-4-Methyl-2-Pentanone 107-70-0  
2-Methoxyphenol 90-05-1  
3-Methoxyphenol 150-19-6  
4-Methoxyphenol 150-76-5 X
1-Methoxy-2-propanol 107-98-2 X
2-Methoxy-1-propanol 1589-47-5  
1-Methoxy-2-propyl acetate 108-65-6 X
2-Methoxy-1-propyl acetate 70657-70-4  
6-Methoxytetralone 1078-19-9 X
Methylacetamide 79-16-3  
Methyl acetate 79-20-9 X
Methyl Acetylene 74-99-7 X
Methyl Acetylene-Propadiene Mixture 59355-75-8 X
Methyl Acrylate 96-33-3 X
Methyl Acrylonitrile 126-98-7 X
Methylal 109-87-5 X
Methyl Alcohol 67-56-1 X
Methylamine 74-89-5 X
2-Methylaminoethanol 109-83-1  
Methyl (n-amyl) ketone 110-43-0 X
5-Methyl-o-Anisidine 120-71-8 X
Methyl Benzoate 93-58-3  
2-Methylbutane 78-78-4 X
Methyl Bromide 74-83-9 X
Methyl Chloride 74-87-3 X
Methyl Chloroform 71-55-6 X
3-Methylcholanthrene 56-49-5  
6-Methylcoumarin 92-48-8 X
Methyl 2-Cyanoacrylate 137-05-3 X
Methylcyclohexane 108-87-2 X
Methylcyclohexanol 25639-42-3 X
o-Methylcyclohexanone 583-60-8 X
Methylcyclopentadienyl manganese tricarbonyl 12108-13-3 X
Methylcyclopentane 96-37-7  
3-Methyl-2-Cyclopentene-2-ol-one 80-71-7 X
Methyl Demeton 8022-00-2 X
Methyl Dicyclohexylamine 7560-83-0  
N-Methyldiethanolamine 105-59-9  
4,4'-Methylene-bis(2-Chloroaniline) 101-14-4 X
2,2'-Methylene-bis(4-chlorophenol) 97-23-4  
Methylene-bis(4-Cyclohexylisocyanate) 5124-30-1 X
4,4'-Methylenebis (N,N-diglycidylaniline) 28768-32-3 X
Methylene bisphenyl isocyanate 101-68-8 X
Methylene Chloride 75-09-2 X
4,4'-Methylenedianiline 101-77-9 X
Methyl Ether 115-10-6  
Methylethylamine 624-78-2  
Methyl Ethyl Ketone Peroxide 1338-23-4 X
Methyl Ethyl Ketoxime 96-29-7 X
Methyl Formamide 123-39-7  
Methyl Formate 107-31-3 X
Methylheptane 589-81-1  
Methylhexane 25495-88-9  
Methyl hydrazine 60-34-4 X
2-Methylimidazole 693-98-1  
Methyl Iodide 74-88-4 X
Methyl Isoamyl Ketone 110-12-3 X
Methyl Isobutyl Carbinol 108-11-2;
105-30-6		 X
Methyl Isobutyrate 547-63-7  
Methyl Isocyanate 624-83-9 X
Methyl Isopropyl Ketone 563-80-4  
2-Methyl-4-Isothiazolin-3-one 2682-20-4  
Methyl Isothiocyanate 556-61-6  
Methyl Mercaptan 74-93-1 X
Methyl Methacrylate 80-62-6 X
4-Methyl Morpholine 109-02-4 X
4-Methyl Morpholine N-oxide 7529-22-8 X
Methyl Naphthalene 1321-94-4  
1-Methylnaphthalene 90-12-0  
2-Methylnaphthalene 91-57-6 X
Methylparaben 99-76-3 X
Methyl Parathion 298-00-0 X
2-Methylpentane 107-83-5  
3-Methylpentane 96-14-0  
p-Methylphenylacetylene 766-97-2  
N-Methylpiperidine 626-67-5  
Methyl pivaloylacetate 55107-14-7 X
2-Methylpyridine 109-06-8 X
3-Methylpyridine 108-99-6 X
4-Methylpyridine 108-89-4 X
N-Methyl-2-Pyrrolidinone 872-50-4 X
Methyl Salicylate 119-36-8  
Methyl silicate 681-84-5 X
alpha-Methyl Styrene 98-83-9 X
beta-Methyl Styrene 637-50-3  
17-alpha-Methyl Testosterone 58-18-4  
Methyl Thiocyanate 556-64-9 X
2-Methylthiophene 554-14-3  
3-Methylthiophene 614-44-4  
Methyl vinyl ketone 78-94-4 X
Methyl Violet 8004-87-3  
Metolachlor 51218-45-2  
Metribuzin 21087-64-9  
Mica 12001-26-2 X
Mineral Wool Fiber   X
Minimum Explosive Concentration    
Minimum Ignition Energy    
Mirex 2385-85-5 X
Moisture Content    
Molybdenum (as Mo), Insoluble Compounds (Total Dust) 7439-98-7 X
Molybdenum (as Mo), Soluble Compounds 7439-98-7 X
Mometasone Furoate 83919-23-7  
Monensin 17090-79-8 X
Monilia species   X
Monochloroacetic Acid 79-11-8  
Monocrotophos 6923-22-4 X
Monomethyl Aniline 100-61-8 X
Monosodium Acid Methanearsonate 2163-80-6  
Morphine sulfate 6211-15-0 X
Morpholine 110-91-8 X
Mortierella species   X
Mucochloric Acid 87-56-9  
Mucor   X
Mycobacterium species