| Maganese Oxide | 112 | 1.800 | 0.03144 | 0.7986 |
| Magnesite | 71 | 1.138 | 0.00290 | 0.0737 |
| Magnesite | 90 | 1.442 | 0.23600 | 5.9944 |
| Magnesite | 116 | 1.859 | 0.06670 | 1.6942 |
| Magnesite | 128 | 2.051 | 0.00200 | 0.0508 |
| Magnesite | 128 | 2.051 | 0.00500 | 0.1270 |
| Magnesium Chloride | 49 | 0.785 | 0.37500 | 9.5250 |
| Magnesium Chloride | 56 | 0.897 | 0.04690 | 1.1913 |
| Magnesium Chloride Prills | 45 | 0.720 | 0.03930 | 0.9982 |
| Magnesium Oxide | 66 | 1.058 | 0.00830 | 0.2108 |
| Magnesium Oxide | 72 | 1.154 | 0.00290 | 0.0737 |
| Magnesium Oxide | 89 | 1.426 | 0.00670 | 0.1702 |
| Magnesium Oxide | 89 | 1.426 | 0.07400 | 1.8796 |
| Magnesium Oxide Pulverized | 101 | 1.619 | 0.00210 | 0.0533 |
| Magnesium Oxide | 109 | 1.747 | 0.37500 | 9.5250 |
| Magnesium Oxide High Iron | 109 | 1.747 | 0.37520 | 9.5301 |
| Magnesium Oxide | 111 | 1.779 | 0.11110 | 2.8219 |
| Magnesium Oxide | 127 | 2.035 | 0.00830 | 0.2108 |
| Magnesium Oxide | 137 | 2.196 | 0.25000 | 6.3500 |
| Magnetic Fines | 123 | 1.970 | 0.03930 | 0.9982 |
| Magnetic Fines | 156 | 2.500 | 0.12500 | 3.1750 |
| Maize Grit Bran Meal | 36 | 0.577 | 0.01000 | 0.2540 |
| Malt Barley | 34 | 0.545 | 0.25000 | 6.3500 |
| Maltodextrin | 7 | 0.112 | 0.01170 | 0.2972 |
| Maltodextrin | 32 | 0.513 | 0.00290 | 0.0737 |
| Manganese Dioxide Ore | 86 | 1.378 | 0.00590 | 0.1499 |
| Manganese Dioxide | 92 | 1.474 | 0.00530 | 0.1346 |
| Manganese Dioxide | 109 | 1.747 | 0.00200 | 0.0508 |
| Manganese Dioxide Electrol | 177 | 2.837 | 0.00700 | 0.1778 |
| Manganese Ferrium | 236 | 3.782 | 0.03330 | 0.8458 |
| Marble Chips | 90 | 1.442 | 0.05900 | 1.4986 |
| Meal | 81 | 1.300 | 0.00354 | 0.0898 |
| Meal Corn Cob | 20 | 0.321 | 0.00700 | 0.1778 |
| Melamine Powder | 47 | 0.760 | 0.00197 | 0.0500 |
| Melamine/Boric Acid/ Dust | 47 | 0.753 | 0.00660 | 0.1676 |
| Metal Powdered | 188 | 3.013 | 0.00970 | 0.2464 |
| Metal Powdered | 252 | 4.038 | 0.00580 | 0.1473 |
| Metal Swarf (Malleable) | 126 | 2.019 | 0.25000 | 6.3500 |
| Metallic Brake Material | 41 | 0.657 | 0.01110 | 0.2819 |
| Metallurgical Coke | 52 | 0.833 | 0.00970 | 0.2464 |
| Methionine | 43 | 0.689 | 0.00670 | 0.1702 |
| Methocel | 27 | 0.433 | 0.00170 | 0.0432 |
| Mica | 19 | 0.304 | 0.07860 | 1.9964 |
| Mica Powder - Coated | 24 | 0.385 | 0.00670 | 0.1702 |
| Mica | 25 | 0.400 | 0.05895 | 1.4973 |
| Mica | 53 | 0.849 | 0.00150 | 0.0381 |
| Microthene-Polyethylene | 25 | 0.401 | 0.00210 | 0.0533 |
| Milk Crossana | 45 | 0.720 | 0.01179 | 0.2995 |
| Milk Powder | 14 | 0.228 | 0.00500 | 0.1270 |
| Milk Powder | 20 | 0.321 | 0.01110 | 0.2819 |
| Milk Powder | 24 | 0.385 | 0.00410 | 0.1041 |
| Milk Powder | 25 | 0.401 | 0.01110 | 0.2819 |
| Milk Powder | 26 | 0.417 | 0.01130 | 0.2870 |
| Milk Powder | 27 | 0.433 | 0.01110 | 0.2819 |
| Milk Powder | 29 | 0.465 | 0.00240 | 0.0610 |
| Milk Powder | 30 | 0.481 | 0.00580 | 0.1473 |
| Milk Powder & Soy Protein | 30 | 0.481 | 0.00670 | 0.1702 |
| Milk Powder | 32 | 0.520 | 0.00983 | 0.2496 |
| Milk Powder | 33 | 0.529 | 0.00300 | 0.0762 |
| Milk Powder & Soy Protein | 33 | 0.529 | 0.00670 | 0.1702 |
| Milk Powder Whole | 35 | 0.561 | 0.00330 | 0.0838 |
| Milk Powder | 36 | 0.580 | 0.00983 | 0.2496 |
| Milk Powder | 39 | 0.630 | 0.00983 | 0.2496 |
| Milorganite Dust | 32 | 0.513 | 0.00130 | 0.0330 |
| Milorganite Fines | 47 | 0.753 | 0.00500 | 0.1270 |
| Milorganite | 48 | 0.769 | 0.02500 | 0.6350 |
| Mine Tailings | 102 | 1.635 | 0.18700 | 4.7498 |
| Min-U-Sil 5 | 31 | 0.497 | 0.00020 | 0.0051 |
| Mixed Batch | 54 | 0.865 | 0.90000 | 22.8600 |
| Mixed Batch (10% Cullet) | 91 | 1.458 | 0.12500 | 3.1750 |
| Mixed Batch (60% Cullet) | 84 | 1.346 | 0.12500 | 3.1750 |
| Mixed Fiber Batch | 105 | 1.683 | 0.25000 | 6.3500 |
| MMF Saw Kerf | 40 | 0.641 | 0.00170 | 0.0432 |
| Molybdenum Oxide | 91 | 1.458 | 0.00330 | 0.0838 |
| Molybdenum Oxide | 116 | 1.859 | 0.01670 | 0.4242 |
| Molybdenum Oxide | 130 | 2.083 | 0.18700 | 4.7498 |
| Molybdenum Oxide | 132 | 2.115 | 0.01670 | 0.4242 |
| Monoammonium Phosphate | 40 | 0.641 | 0.03280 | 0.8331 |
| Monoammonium Phosphate Bl | 60 | 0.962 | 0.00210 | 0.0533 |
| Monoammonium Phosphate | 65 | 1.042 | 0.01900 | 0.4826 |
| Morter Mix | 35 | 0.561 | 0.00290 | 0.0737 |
| Mycelium | 37 | 0.593 | 0.04000 | 1.0160 |