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Note: An asterisk (*) indicates a primary chemical name.

M

CHEMICAL NAME CAS No. RTECS No.
MA 100-61-8 BY4550000 
Mace® 532-27-4 AM6300000 
Magnesia fume 1309-48-4 OM3850000 
Magnesite* 546-93-0 OM2470000 
Magnesium carbonate 546-93-0 OM2470000 
Magnesium(II) carbonate 546-93-0 OM2470000 
Magnesium oxide fume* 1309-48-4 OM3850000 
Malathion* 121-75-5 WM8400000 
Maleic acid anhydride 108-31-6 ON3675000 
Maleic anhydride* 108-31-6 ON3675000 
Malonaldehyde* 542-78-9 TX6475000 
Malonic aldehyde 542-78-9 TX6475000 
Malonic dinitrile 109-77-3 OO3150000 
Malonodialdehyde 542-78-9 TX6475000 
Malononitrile* 109-77-3 OO3150000 
Manganese-55 7439-96-5 (metal) OO9275000 (metal) 
Manganese compounds and fume (as Mn)* 7439-96-5 (metal) OO9275000 (metal) 
Manganese cyclopentadienyl tricarbonyl (as Mn)* 12079-65-1 OO9720000 
Manganese metal 7439-96-5 (metal) OO9275000 (metal) 
Manganese oxide 1317-35-7 OP0895000 
Manganese tetroxide (as Mn)* 1317-35-7 OP0895000 
Manganese tricarbonylmethylcyclopentadienyl 12108-13-3 OP1450000 
Manganomanganic oxide 1317-35-7 OP0895000 
Manmade mineral fibers  PY8070000 
MAPP gas 59355-75-8 UK4920000 
Marble* 1317-65-3 EV9580000 
Margarite 12001-26-2 VV8760000 
Massive talc  VV8780000 
MBK 591-78-6 MP1400000 
MBOCA 101-14-4 CY1050000 
MCB 108-90-7 CZ0175000 
MCT 12079-65-1 OO9720000 
MDA 101-77-9 BY5425000 
MDI 101-68-8 NQ9350000 
Mecrylate 137-05-3 AS7000000 
MEK 78-93-3 EL6475000 
MEKP 1338-23-4 EL9450000 
MEK peroxide 1338-23-4 EL9450000 
Mequinol 150-76-5 SL7700000 
Mercaptoacetate 68-11-1 AI5950000 
Mercaptoacetic acid 68-11-1 AI5950000 
2-Mercaptoacetic acid 68-11-1 AI5950000 
Mercaptobenzene 108-98-5 DC0525000 
1-Mercaptobutane 109-79-5 EK6300000 
1-Mercaptodecane 143-10-2
1-Mercaptododecane 112-55-0 JR3155000 
Mercaptoethane 75-08-1 KI9625000 
Mercaptomethane 74-93-1 PB4375000 
1-Mercaptononane 1455-21-6
1-Mercaptooctadecane 2885-00-9
1-Mercaptooctane 111-88-6
3-Mercaptopropane 107-03-9 TZ7300000 
Mercury compounds [except (organo) alkyls] (as Hg)* 7439-97-6 (metal) OV4550000 (metal) 
Mercury metal 7439-97-6 (metal) OV4550000 (metal) 
Mercury (organo) alkyl compounds (as Hg)*  
Mesitylene 108-67-8 OX6825000 
Mesityl oxide* 141-79-7 SB4200000 
Metacetone 96-22-0 SA8050000 
Metacetonic acid 79-09-4 UE5950000 
Metallic mercury 7439-97-6 (metal) OV4550000 (metal) 
Metallic tin 7440-31-5 XP7320000 
Metallum problematum 13494-80-9 WY2625000 
Metasystox® 8022-00-2 TG1760000 
Methacrylate monomer 80-62-6 OZ5075000 
Methacrylic acid* 79-41-4 OZ2975000 
α-Methacrylic acid 79-41-4 OZ2975000 
Methacrylic acid (glacial) 79-41-4 OZ2975000 
Methacrylic acid (inhibited) 79-41-4 OZ2975000 
Methacrylonitrile 126-98-7 UD1400000 
Methanal 50-00-0 LP8925000 
Methanamide 75-12-7 LQ0525000 
Methanecarboxylic acid 64-19-7 AF1225000 
Methane tetrabromide 558-13-4 FG4725000 
Methane tetramethylol 115-77-5 RZ2490000 
Methanethiol 74-93-1 PB4375000 
Methane trichloride 67-66-3 FS9100000 
Methanoic acid 64-18-6 LQ4900000 
Methanol 67-56-1 PC1400000 
Methoflurane 76-38-0 KN7820000 
Methomyl* 16752-77-5 AK2975000 
o-Methoxyaniline 90-04-0 BZ5410000 
p-Methoxyaniline 104-94-9 BZ5450000 
4-Methoxy-1,3-benzene-diamine 615-05-4 BZ8580500 
Methoxycarbonylethylene 96-33-3 AT2800000 
Methoxychlor* 72-43-5 KJ3675000 
Methoxy-DDT 72-43-5 KJ3675000 
2-Methoxyethanol 109-86-4 KL5775000 
2-Methoxyethyl acetate 110-49-6 KL5950000 
Methoxyfluorane 76-38-0 KN7820000 
Methoxyflurane* 76-38-0 KN7820000 
1-Methoxy-2-hydroxypropane 107-98-2 UB7700000 
2-Methoxy-1-methylethanol 107-98-2 UB7700000 
Methoxymethyl methyl ether 109-87-5 PA8750000 
4-Methoxyphenol* 150-76-5 SL7700000 
p-Methoxyphenol 150-76-5 SL7700000 
4-Methoxy-m-phenylene-diamine 615-05-4 BZ8580500 
2,2-bis(p-Methoxyphenyl)-1,1,1-trichloroethane 72-43-5 KJ3675000 
1-Methoxy-2-propanol 107-98-2 UB7700000 
Methyl acetate* 79-20-9 AI9100000 
Methyl acetic acid 79-09-4 UE5950000 
Methyl acetone 78-93-3 EL6475000 
Methyl acetylene* 74-99-7 UK4250000 
Methyl acetylene-allene mixture 59355-75-8 UK4920000 
Methyl acetylene-propadiene mixture* 59355-75-8 UK4920000 
Methyl acetylene-propadiene mixture (stabilized) 59355-75-8 UK4920000 
β-Methyl acrolein 4170-30-3 GP9499000 
Methyl acrylate* 96-33-3 AT2800000 
2-Methylacrylic acid 79-41-4 OZ2975000 
Methylacrylonitrile* 126-98-7 UD1400000 
α-Methylacrylonitrile 126-98-7 UD1400000 
Methylal* 109-87-5 PA8750000 
Methyl alcohol* 67-56-1 PC1400000 
Methyl aldehyde 50-00-0 LP8925000 
Methylamine* 74-89-5 PF6300000 
Methylamine (anhydrous) 74-89-5 PF6300000 
Methylamine (aqueous) 74-89-5 PF6300000 
(Methylamino)benzene 100-61-8 BY4550000 
1-Methyl-2-aminobenzene 95-53-4 XU2975000 
Methyl amyl alcohol 108-11-2 SA7350000 
Methyl (n-amyl) ketone* 110-43-0 MJ5075000 
2-Methylaniline 95-53-4 XU2975000 
3-Methylaniline 108-44-1 XU2800000 
4-Methylaniline 106-49-0 XU3150000 
N-Methyl aniline 100-61-8 BY4550000 
o-Methylaniline 95-53-4 XU2975000 
Methyl azinphos 86-50-0 TE1925000 
2-Methylaziridine 75-55-8 CM8050000 
Methyl benzene 108-88-3 XS5250000 
3-Methylbenzenamine 108-44-1 XU2800000 
4-Methylbenzenamine 106-49-0 XU3150000 
Methyl benzol 108-88-3 XS5250000 
Methyl bromide* 74-83-9 PA4900000 
3-Methyl-1-butanol 123-51-3 EL5425000 
3-Methyl-2-butanol 6032-29-7 SA4900000 
3-Methyl-1-butanol acetate 123-92-2 NS9800000 
3-Methyl-2-butanone 563-80-4 EL9100000 
3-Methyl butan-2-one 563-80-4 EL9100000 
1-Methylbutyl acetate 626-38-0 AJ2100000 
1-Methyl-4-tert-butylbenzene 98-51-1 XS8400000 
Methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate 17804-35-2 DD6475000 
3-Methylbutyl ester of acetic acid 123-92-2 NS9800000 
3-Methylbutyl ethanoate 123-92-2 NS9800000 
Methyl butyl ketone 591-78-6 MP1400000 
Methyl n-butyl ketone 591-78-6 MP1400000 
Methyl Cellosolve®* 109-86-4 KL5775000 
Methyl Cellosolve® acetate* 110-49-6 KL5950000 
Methyl chloride* 74-87-3 PA6300000 
Methyl chlorobromide 74-97-5 PA5250000 
Methyl chloroform* 71-55-6 KJ2975000 
Methylchloromethyl ether 107-30-2 KN6650000 
Methyl cyanide 75-05-8 AL7700000 
Methyl cyanoacrylate 137-05-3 AS7000000 
Methyl-2-cyanoacrylate* 137-05-3 AS7000000 
Methyl α-cyanoacrylate 137-05-3 AS7000000 
Methylcyclohexane* 108-87-2 GV6125000 
Methylcyclohexanol* 25639-42-3 GW0175000 
2-Methylcyclohexanone 583-60-8 GW1750000 
o-Methylcyclohexanone* 583-60-8 GW1750000 
2-Methylcyclopentadienyl manganese tricarbonyl 12108-13-3 OP1450000 
Methyl cyclopentadienyl manganese tricarbonyl (as Mn)* 12108-13-3 OP1450000 
Methyl demeton* 8022-00-2 TG1760000 
4-Methyl-2,6-di-tert-butyl phenol 128-37-0 GO7875000 
2-Methyl-3,5-dinitrobenzamide 148-01-6 XS4200000 
Methyldinitrobenzene 25321-14-6 XT1300000 
4,4'-Methylenebis(2-chloroaniline)* 101-14-4 CY1050000 
4,4'-Methylenebis(o-chloro aniline) 101-14-4 CY1050000 
4,4'-Methylenebis(2-chlorobenzenamine) 101-14-4 CY1050000 
Methylene bis(4-cyclohexylisocyanate)* 5124-30-1 NQ9250000 
Methylene bisphenyl isocyanate* 101-68-8 NQ9350000 
Methylene chloride* 75-09-2 PA8050000 
4,4'-Methylenedianiline* 101-77-9 BY5425000 
Methylene dichloride 75-09-2 PA8050000 
Methylene dimethyl ether 109-87-5 PA8750000 
Methylene di-p-phenylene ester of isocyanic acid 101-68-8 NQ9350000 
Methylene oxide 50-00-0 LP8925000 
Methylene bis(4-phenyl isocyanate) 101-68-8 NQ9350000 
Methyl ester of acetic acid 79-20-9 AI9100000 
Methyl ester of acrylic acid 96-33-3 AT2800000 
Methyl ester of 2-cyanoacrylic acid 137-05-3 AS7000000 
Methyl ester of formic acid 107-31-3 LQ8925000 
Methyl ester of isocyanic acid 624-83-9 NQ9450000 
Methyl ester of methacrylic acid 80-62-6 OZ5075000 
Methyl ethanoate 79-20-9 AI9100000 
N-(1-Methylethyl)-benzenamine 768-52-5 BY4190000 
Methyl ethyl carbinol 78-92-2 EO1750000 
2-Methylethyleneimine 75-55-8 CM8050000 
Methyl ethylene oxide 75-56-9 TZ2975000 
1-Methylethyl ester of acetic acid 108-21-4 AI4930000 
Methyl ethyl ketone 78-93-3 EL6475000 
Methyl ethyl ketone hydroperoxide 1338-23-4 EL9450000 
Methyl ethyl ketone peroxide* 1338-23-4 EL9450000 
Methylethylmethane 106-97-8 EJ4200000 
N-(1-Methylethyl)-2-propanamine 108-18-9 IM4025000 
Methyl formate* 107-31-3 LQ8925000 
3-Methyl-5-heptanone 541-85-5 MJ7350000 
5-Methyl-3-heptanone* 541-85-5 MJ7350000 
2-Methyl-5-hexanone 110-12-3 MP3850000 
5-Methyl-2-hexanone 110-12-3 MP3850000 
Methyl hydrazine* 60-34-4 MV5600000 
Methyl iodide* 74-88-4 PA9450000 
Methylisoamyl acetate 108-84-9 SA7525000 
Methyl isoamyl ketone* 110-12-3 MP3850000 
Methyl isobutenyl ketone 141-79-7 SB4200000 
Methyl isobutyl carbinol* 108-11-2 SA7350000 
Methyl isobutyl ketone 108-10-1 SA9275000 
Methyl isocyanate* 624-83-9 NQ9450000 
N-Methyl-2-isopropoxyphenyl-carbamate 114-26-1 FC3150000 
Methyl isopropyl ketone* 563-80-4 EL9100000 
2-Methyllactonitrile 75-86-5 OD9275000 
Methyl mercaptan* 74-93-1 PB4375000 
Methyl mercaptophos 8022-00-2 TG1760000 
Methyl methacrylate* 80-62-6 OZ5075000 
N-Methylmethanamine 124-40-3 IP8750000 
Methyl methanoate 107-31-3 LQ8925000 
Methyl N-((methylamino)carbonyl)oxy)ethanimidothioate 16752-77-5 AK2975000 
S-Methyl-N-(methylcarbamoyloxy)thioacetimidate 16752-77-5 AK2975000 
Methyl-2-methyl-2-propenoate 80-62-6 OZ5075000 
2-Methylnitrobenzene 88-72-2 XT3150000 
3-Methylnitrobenzene 99-08-1 XT2975000 
4-Methylnitrobenzene 99-99-0 XT3325000 
m-Methylnitrobenzene 99-08-1 XT2975000 
o-Methylnitrobenzene 88-72-2 XT3150000 
p-Methylnitrobenzene 99-99-0 XT3325000 
N-Methyl-N-nitroso-methanamine 62-75-9 IQ0525000 
Methyl orthosilicate 681-84-5 VV9800000 
Methyloxirane 75-56-9 TZ2975000 
Methyl parathion* 298-00-0 TG0175000 
2-Methylpentane  
3-Methylpentane  
2-Methyl-2,4-pentanediol 107-41-5 SA0810000 
4-Methyl-2,4-pentanediol 107-41-5 SA0810000 
2-Methylpentane-2,4-diol 107-41-5 SA0810000 
4-Methyl-2-pentanol 108-11-2 SA7350000 
2-Methyl-2-pentanol-4-one 123-42-2 SA9100000 
4-Methyl 2-pentanone 108-10-1 SA9275000 
4-Methyl-3-penten-2-one 141-79-7 SB4200000 
2-Methyl phenol 95-48-7 GO6300000 
3-Methyl phenol 108-39-4 GO6125000 
4-Methyl phenol 106-44-5 GO6475000 
Methylphenylamine 100-61-8 BY4550000 
Methylphenylene diamine 25376-45-8
95-80-7 (2,4-TDA)
XS9445000 
XS9625000 (2,4-TDA) 
1-Methyl-1-phenylethylene 98-83-9 WL5075300 
Methyl phosphite 121-45-9 TH1400000 
2-Methylpropane 75-28-5 TZ4300000 
2-Methylpropanenitrile 78-82-0 TZ4900000 
2-Methyl-1-propanol 78-83-1 NP9625000 
2-Methyl-2-propanol 75-65-0 EO1925000 
2-Methylpropenenitrile 126-98-7 UD1400000 
Methyl propenoate 96-33-3 AT2800000 
2-Methylpropenoic acid 79-41-4 OZ2975000 
2-Methylpropionitrile 78-82-0 TZ4900000 
1-Methylpropyl acetate 105-46-4 AF7380000 
2-Methylpropyl acetate 110-19-0 AI4025000 
2-Methylpropyl ester of acetic acid 110-19-0 AI4025000 
β-Methylpropyl ethanoate 110-19-0 AI4025000 
Methyl propyl ketone 107-87-9 SA7875000 
2-(1-Methylpropyl)phenol 89-72-5 SJ8920000 
3-(1-Methyl-2-pyrrolidyl)pyridine 54-11-5 QS5250000 
Methyl silicate* 681-84-5 VV9800000 
Methylstyrene 25013-15-4 (inhibited) WL5075000 
a-Methyl styrene* 98-83-9 WL5075300 
Methyl sulfate 77-78-1 WS8225000 
Methyl sulfhydrate 74-93-1 PB4375000 
Methyl systox® 8022-00-2 TG1760000 
N-Methyl-N,2,4,6-tetranitroaniline 479-45-8 BY6300000 
Methyl tribromide 75-25-2 PB5600000 
1-Methyl-2,4,6-trinitrobenzene 118-96-7 XU0175000 
Methyl yellow 60-11-7 BX7350000 
Metribuzin* 21087-64-9 XZ2990000 
Mevinphos 7786-34-7 GQ5250000 
MIAK 110-12-3 MP3850000 
MIBC 108-11-2 SA7350000 
MIBK 108-10-1 SA9275000 
MIC 624-83-9 NQ9450000 
Mica (containing less than 1% quartz)* 12001-26-2 VV8760000 
Mineral carbon 7782-42-5 MD9659600 
Mineral spirits 8052-41-3 WJ8925000 
Mineral white 13397-24-5 MG2360000 
Mineral wool fiber*  PY8070000 
MIPK 563-80-4 EL9100000 
MMH 60-34-4 MV5600000 
MMT 12108-13-3 OP1450000 
MOCA 101-14-4 CY1050000 
Molecular bromine 7726-95-6 EF9100000 
Molecular chlorine 7782-50-5 FO2100000 
Molecular iodine 7553-56-2 NN1575000 
Molybdenum* 7439-98-7 QA4680000 
Molybdenum (soluble compounds, as Mo)*  
Molybdenum metal 7439-98-7 QA4680000 
Monoammonium salt of sulfamic acid 7773-06-0 WO6125000 
Monobromoethane 74-96-4 KH6475000 
Monobromoethylene 593-60-2 KU8400000 
Monobromomethane 74-83-9 PA4900000 
Monobromotrifluoromethane 75-63-8 PA5425000 
Monochloroacetyl chloride 79-04-9 AO6475000 
Monochlorobenzene 108-90-7 CZ0175000 
Monochlorodifluoromethane 75-45-6 PA6390000 
Monochloroethane 75-00-3 KH7525000 
Monochloroethene 75-01-4 KU9625000 
Monochloroethylene 75-01-4 KU9625000 
Monochloromethane 74-87-3 PA6300000 
Monochloropentafluoroethane 76-15-3 KH7877500 
Monocron 6923-22-4 TC4375000 
Monocrotophos* 6923-22-4 TC4375000 
Monoethanolamine 141-43-5 KJ5775000 
Monoethylamine 75-04-7 KH2100000 
Monoethylene glycol 107-21-1 KW2975000 
Monofluoroethylene 75-02-5 YZ7351000 
Monofluorotrichloromethane 75-69-4 PB6125000 
Monogermane 7782-65-2 LY4900000 
Monohydroxybenzene 108-95-2 SJ3325000 
Monoiodomethane 74-88-4 PA9450000 
Monoisopropylamine 75-31-0 NT8400000 
Monomethylamine 74-89-5 PF6300000 
Monomethyl aniline* 100-61-8 BY4550000 
Monomethyl ether hydroquinone 150-76-5 SL7700000 
Monomethylhydrazine 60-34-4 MV5600000 
Mononitrogen monoxide 10102-43-9 QX0525000 
Monopentaerythritol 115-77-5 RZ2490000 
Monophenylhydrazine 100-63-0 MV8925000 
Monosilane 7803-62-5 VV1400000 
Monosodium salt of sulfurous acid 7631-90-5 VZ2000000 
Monoxide 630-08-0 FG3500000 
Morpholine* 110-91-8 QD6475000 
Motor fuel 8006-61-9 LX3300000 
Motor spirits 8006-61-9 LX3300000 
MPK 107-87-9 SA7875000 
Muriatic ether 75-00-3 KH7525000 
Muscovite 12001-26-2 VV8760000 
MXDA 1477-55-0 PF8970000 
 
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