| Ligroin | B | B | A | D | A | A | A | A | D/150 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lignin Liquor | A | A | A | A | A | ||||||
| Lime | A | B | A | A | A | A | C | A | A | ||
| Lime, Soda | A | B | B | A | B | A | |||||
| Lime, Bleach | A | B | A | A | A | A | D | A | B | ||
| Lime Slurries | A | A | B | B | A | B | B | ||||
| Lime Sulfur | B | A | D | C | A | A | A | A | A | ||
Limonene |
D | C | D | A | A | ||||||
| Lindol | A | C | D | A | B | A | |||||
| Linoleic Acid | B | D | B | D | A | A | A | D | A | A/70 | |
| Linseed Oil | B | A | A | C | A | A | A | A | A | A | |
| Lithium Bromide | D | A | A | A | A | A | |||||
| Liquefied Petroleum Gas | B | B | A | D | A | A | D | ||||
| Lubricants | D | B | A | D | A | A | A | A | A | B | A |
| Lubricating Oils (Petroleum) | D | B | A | D | A | A | A | A | A | B | A |
| Lye | A | B | C | B | B | A | A | A | A | A/150 | |
| Magnesium Carbonate | A | A | A | C | A | D | A | A | A | ||
| Magnesium Chloride | A | A | A | A | A | A | D | D | D | A | A |
| Magnesium Hydroxide | A | B | B | A | A | A | D | B | A | A | A |
| Magnesium Nitrate | A | A | A | A | A | D | A | A | A | ||
| Magnesium Oxide | A | A | A | A | A | ||||||
| Magnesium Sulfate | A | A | A | A | A | A | D | C | A | B | A |
| Maleic Acid | A | D | D | C | A | A | B | A | A | A | |
| Maleic Anhyride | A | D | D | C | A | A | |||||
| Malic Acid | A | C | B | D | A | A | B | D | A | B | |
| Maple Sugar Liquors (Sucrose) |
A | A | A | A | A | A | A | ||||
| Mash | A | A | A | ||||||||
| Mayonnaise | A | A | A | D | D | A | A | ||||
| Melamine | B | C | D | ||||||||
| Mercuric Chloride (Dilute Solution) |
A | A | A | A | A | A | D | D | D | A | A |
| Mercuric Cyanide | A | A | A | A | A | D | A | A | A | ||
| Mercurous Nitrate | B | B | A | A | A | D | B | B | A | ||
| Mercury | A | A | A | A | A | A | C | A | A | A | A |
| Mesityl Oxide | C | D | D | B | D | A | A | A | A | ||
| Methane | C | B | A | D | A | A | A | A | B | A | |
| Methanol | A | A | A | B | C | A | B | A | A | A/120 | A |
| Methyl Acetate | B | B | D | A | D | A | A | A | A | C | B/72 |
| Methyl Acetoacetate | D | D | A | A | A | ||||||
| Methyl Acrylate | B | B | D | B | D | A | A | B/72 | |||
| Methyl Acrylic Acid | C | C | D | A | |||||||
| Methyl Acetone | B | D | D | A | A | A | A | D | D | ||
| Methlyl Amine (Monomethylamine) |
A | A | B | A | A | A | B | B | A | A | |
| Methyl Amyl Acetate | D | D | D | D | A | A | |||||
| Methyl Amyl Alcohol | A | D | A | A | A | A | |||||
| Methyl Aniline | A | A | A | A |


