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M

Recommendations for Chemical Protective Clothing: A Companion to the NIOSH Pocket Guide to Chemical Hazards


TABLE M

Chemical CAS No. Recommendation for skin protection Recommended protective clothing barriers*
Magnesite 546-93-0 N.R. Determine based on working conditions
Magnesium oxide fume 1309-48-4 N.R. Determine based on working conditions
Malathion 121-75-5 Prevent skin contact 4 hr: Teflon, PE/EVAL
Maleic anhydride 108-31-6 Prevent skin contact 8 hr: Responder
Malonaldehyde 542-78-9 Prevent skin contact Contact the manufacturer for recommendations
Malononitrile 109-77-3 Prevent skin contact Contact the manufacturer for recommendations
Manganese compounds and fume (as Mn) 7439-96-5 (metal) N.R. Determine based on working conditions
Manganese cyclopentadienyl tricarbonyl (as Mn) 12079-65-1 Prevent skin contact Contact the manufacturer for recommendations
Manganese tetroxide (as Mn) 1317-35-7 N.R. Determine based on working conditions
Marble 1317-65-3 N.R. Determine based on working conditions
Mercury compounds [except (organo) alkyls] (as Hg) 7439-97-6 (metal) Prevent skin contact Contact the manufacturer for recommendations for the specific compound
Mercury (organo) alkyl compounds (as Hg) Prevent skin contact Contact the manufacturer for recommendations for the specific compound
Mesityl oxide 141-79-7 Prevent skin contact 8 hr: Responder
Methacrylic acid 79-41-4 Prevent skin contact 8 hr: Butyl, Viton, PE/EVAL, REsponder, Tychem
Methomyl 16752-77-5 Prevent skin contact 8 hr: Tychem
Methoxychlor 72-43-5 Prevent skin contact Contact the manufacturer for recommendations
Methoxyflurane 76-38-0 N.R. Determine based on working conditions
4-Methoxyphenol 150-76-5 Prevent skin contact Contact the manufacturer for recommendations
Methyl acetate 79-20-9 Prevent skin contact 8 hr: PE/EVAL 4 hr: Teflon
Methyl acetylene 74-99-7 Frostbite Prevent possible skin freezing from direct liquid contact
Methyl acetylene-propadiene mixture 59355-75-8 Frostbite Prevent possible skin freezing from direct liquid contact
Methyl acrylate 96-33-3 Prevent skin contact 8 hr: Butyl, Tychem 4 hr: Teflon
Methylacrylonitrile 126-98-7 Prevent skin contact Contact the manufacturer for recommendations
Methylal 109-87-5 Prevent skin contact Contact the manufacturer for recommendations
Methyl alcohol 67-56-1 Prevent skin contact 8 hr: Butyl, Teflon, Viton, Saranex, PE/EVAL, Responder, Trellchem, Tychem
Methylamine 74-89-5 Prevent skin contact (solution)/ Frostbite 8 hr: Responder, Tychem 4 hr: Teflon Prevent possible skin freezing from direct liquid contact
Methyl (n-amyl) ketone 110-43-0 Prevent skin contact 4 hr: PE/EVAL
Methyl bromide 74-83-9 Prevent skin contact (liquid) 8 hr: Responder, Tychem 4 hr: Butyl, Neoprene, Teflon
Methyl Cellosolve® 109-86-4 Prevent skin contact 8 hr: Butyl, Tychem 4 hr: PE/EVAL
Methyl Cellosolve® acetate 110-49-6 Prevent skin contact 8 hr: Butyl, Tychem 4 hr: Saranex, PE/EVAL
Methyl chloride 74-87-3 Prevent skin contact/ Frostbite 8 hr: Viton, Saranex, Barricade, Responder, Trellchem, Tychem 4 hr: Teflon Prevent possible skin freezing from direct liquid contact
Methyl chloroform 71-55-6 Prevent skin contact 8 hr: PVA, Viton, PE/EVAL, Barricade, CPF3, Responder, Tychem 4 hr: Teflon
Methyl-2-cyanoacrylate 137-05-3 Prevent skin contact Contact the manufacturer for recommendations
Methylcyclohexane 108-87-2 Prevent skin contact Contact the manufacturer for recommendations
Methylcyclohexanol 25639-42-3 Prevent skin contact Contact the manufacturer for recommendations
o-Methylcyclohexanone 583-60-8 Prevent skin contact Contact the manufacturer for recommendations
Methyl cyclopentadienyl manganese tricarbonyl (as Mn) 12108-13-3 Prevent skin contact Contact the manufacturer for recommendations
Methyl demeton 8022-00-2 Prevent skin contact Contact the manufacturer for recommendations
4,4'-Methylenebis(2-chloroaniline) 101-14-4 Prevent skin contact 8 hr: Saranex, Barricade 4 hr: PE/EVAL
Methylene bis(4-cyclo-hexylisocyanate) 5124-30-1 Prevent skin contact Contact the manufacturer for recommendations
Methylene bisphenyl isocyanate 101-68-8 Prevent skin contact 8 hr: PE/EVAL, Barricade, Responder
Methylene chloride 75-09-2 Prevent skin contact 8 hr: PVA, PE/EVAL, Responder, Trellchem, Tychem 4 hr: Teflon, Barricade
4,4'-Methylenedianiline 101-77-9 Prevent skin contact 8 hr: PE/EVAL
Methyl ethyl ketone peroxide 1338-23-4 Prevent skin contact Contact the manufacturer for recommendations
Methyl formate 107-31-3 Prevent skin contact Contact the manufacturer for recommendations
5-Methyl-3-heptanone 541-85-5 Prevent skin contact Contact the manufacturer for recommendations
Methyl hydrazine 603-4-4 Prevent skin contact 8 hr: Responder, Tychem
Methyl iodide 74-88-4 Prevent skin contact 8 hr: Viton, Responder, Tychem
Methyl isoamyl ketone 110-12-3 Prevent skin contact Contact the manufacturer for recommendations
Methyl isobutyl carbinol 108-11-2 Prevent skin contact Contact the manufacturer for recommendations
Methyl isocyanate 624-83-9 Prevent skin contact 8 hr: PVA, Barricade, Responder, Trellchem, Tychem
Methyl isopropyl ketone 563-80-4 Prevent skin contact Contact the manufacturer for recommendations
Methyl mercaptan 74-93-1 Prevent skin contact (liquid)/ Frostbite 8 hr: Barricade, Responder, Tychem Prevent possible skin freezing from direct liquid contact
Methyl methacrylate 80-62-6 Prevent skin contact 8 hr: PVA, PE/EVAL, Barricade, Trellchem 4 hr: Teflon
Methyl parathion 298-00-0 Prevent skin contact Contact the manufacturer for recommendations
Methyl silicate 681-84-5 Prevent skin contact Contact the manufacturer for recommendations
alpha-Methyl styrene 98-83-9 Prevent skin contact Contact the manufacturer for recommendations
Metribuzin 21087-64-9 Prevent skin contact Contact the manufacturer for recommendations
Mica (containing less than 1% quartz) 12001-26-2 N.R. Determine based on working conditions
Mineral wool fiber Prevent skin contact Any barrier that will prevent contamination from the dust and fiber
Molybdenum 7439-98-7 N.R. Determine based on working conditions
Molybdenum (soluble compounds, as Mo) Prevent skin contact Contact the manufacturer for recommendations for specific compounds
Monocrotophos 6923-22-4 Prevent skin contact Contact the manufacturer for recommendations
Monomethyl aniline 100-61-8 Prevent skin contact Contact the manufacturer for recommendations
Morpholine 110-91-8 Prevent skin contact 8 hr: Butyl, PE/EVAL
Recommendations for skin protection
Prevent skin contact....Wear appropriate personal protective clothing to prevent skin contact. Suggested barriers for use should be confirmed with the vendor and for additional information and use limitations.
Frostbite....................Wear appropriate personal protective clothing to prevent the skin from becoming frozen from contact with the evaporating liquid or from contact with vessels containing the liquid.
N.R...........................No specific recommendation can be made. Actual working conditions will determine the need and type of personal protective equipment.
†Bold type indicates a change from or an addition to what is published in the NIOSH Pocket Guide to Chemical Hazards, June 1997 Edition. Recommended protective clothing barriers*

Butyl = Butyl Rubber (Gloves, Suits, Boots) Natural = Natural Rubber (Gloves) Neoprene = Neoprene Rubber (Gloves, Suits, Boots) Nitrile = Nitrile Rubber (Gloves, Suits, Boots) PE = Polyethylene (Gloves, Suits, Boots) PVA = Polyvinyl Alcohol (Gloves) PVC = Polyvinyl Chloride (Gloves, Suits, Boots) Teflon = Teflon™ (Gloves, Suits, Boots) Viton = Viton™ (Gloves, Suits) Saranex = Saranex™ coated suits PE/EVAL = 4H™ and Silver Shield™ brand gloves Barricade = Barricade™ coated suits CPF3 = CPF3™ suits Responder = Responder™ suits Trellchem = Trellchem HPS™ suits Tychem = Tychem 10000™ suits

8 hr = More than 8 hours of resistance to breakthrough >0.1  microng/cm2/min. 4 hr = At least 4 but less than 8 hours of resistance to breakthrough >0.1  microng/cm2/min.

*Neoprene is a tradename and Teflon, Barricade and Tychem 10000 are trademarks of the DuPont Company. Viton is a registered trademark of DuPont Dow Elastomers. Saranex is a tradename of the Dow Chemical Company. 4H is a trademark of the Safety 4 Company. Silver Shield is a trademark of the Siebe North Company. CPF3 and Responder are trademarks of the Kappler Company. Trellchem HPS is a trademark of the Trelleborg Company. Recommendations are NOT valid for very thin Natural Rubber, Neoprene, Nitrile, and PVC gloves (0.3 mm or less).

 

 
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