M Magnesium chloride
Magnesium hydroxide
 
Magnesium sulfate
 
Maleic acid
 
Malic acid    
 
Mercuric chloride
 
Mercury
 
Methane gas
 
Methly acetate  
 
Methyl alcohol (Methanol)
Methyl chloride
Methyl ethyl ketone
Methyl isobutyl ketone
Methyl methacrylate  
 
Methylene dichloride
Milk  
 
Mineral oil
Monochloroacetic acid
 
Monochlorobenzene
(Chlorobenzene)
Monoethanolamine