| Chemical Name | C.I. | Company | Bottle Size | Hazard(s) |
| Malachite Green-Oxalate | 42000 | Hartman-Leddon Company | 2 @ 10g | |
| Malachite Green | Difco Laboratories | 10g | ||
| Malachite Green | Arthur Thomas Company | 25g | ||
| Malachite Green | Allied Chemicals | 10g | ||
| Malachite Green-Oxalate | Pharmaceutical Laboratories | 25g | ||
| Manchester Yellow (Martius-Yellow) | ICN | 2 @ 10g | ||
| May-Greenwald Stain | Arthur Thomas Company | 3 @ 113.4ml | ||
| Meta Cresol Purple W.S. | Arthur Thomas Company | 1g | ||
| Methylene Blue | 52015 | Allied Chemicals | 10g | |
| Methylene Blue NN (Basic Blue 24) | 52030 | Allied Chemicals | 25g | Irritant |
| Methylene Blue U.S.P. | Fisher | |||
| Methylene Blue Bacto | 922 | Difco Laboratories | 25g | |
| Methyl Green | 42590 | Fisher | 10g | |
| Methyl Green | 684 | Hartman-Leddon Company | 10g | |
| Methyl Green | 42590 | Sigma | 5g | |
| Methyl Green | 42590 | Allied Chemicals | 10g | |
| Methyl Red | Fisher | 10g | ||
| Methyl Salicylate | Fisher | 4 @ 473ml | ||
| Methyl Violet 2B | Matheson, Coleman and Bell | 10g | ||
| Napthol Green B (Acid Green 1) | Matheson, Coleman and Bell | 10g | ||
| Napthol Yellow | Coleman and Bell Company | 10g | ||
| Neutral Red | Matheson, Coleman and Bell | 10g | ||
| Neutral Red | 50040 | Hartman-Leddon Company | 10g | |
| Nigrosin W.S. | 50420 | Hartman-Leddon Company | 25g | |
| Nigrosin W.S. | 865 | Pharmaceutical Labs | 25g | |
| Nile Blue A | Acros Organics | 10g | ||
| Nile Blue A | 51180 | Hartman-Leddon Company | 10g | |
| Nitrosulphonazo III | BDH Chemicals Inc. | |||
| Oil Cedar Wood | Fritzsche Brothers Inc. | |||
| Oil Red O | Allied Chemicals | 25g | ||
| Orange G | 16230 | Hartman-Leddon Company | 2 @ 25g | |
| Orange G | 16230 | Hartman-Leddon Company | 3 @ 10g | |
| Orange G | 16230 | Fisher | 3 @ 25g | |
| Orange G | 16230 | Allied Chemicals | 2 @ 10g | |
| Orange I | Arthur Thomas Company | 10g | ||
| Orange IV (Acid Orange 5) | 1380 | Matheson, Coleman and Bell | 25g | |
| Orcein | Carolina Biological Supply | 1g | ||
| Orcein | Fisher | 5g | ||
| Paragon | CPC | 50ml | ||
| O-Phenanthroline | Fisher | 5g | ||
| O-Phenanthroline | Fisher | 1g | ||
| Phenol Red U.S.P. | Coleman and Bell Company | 5g | ||
| 4-Phenylazodiphenylamine | Eastman Inorganic Corporation | |||
| Phloroglucinol | Eastman Inorganic Corporation | 25g | ||
| Poirrier's Blue (Cotton Blue C4B) | Allied Chemicals | 25g | ||
| Ponceau 2R | 16150 | Allied Chemicals | 10G | |
| Ponceau 3R | National Medical Products | |||
| Ponceau S | 27195 | Allied Chemicals | 25g | |
| Ponta Chrome Violet S.W. | Nutritional Biochemical Corporation | 5g | ||
| Ponta Chrome Blue Black ZF | Nutritional Biochemical Corporation | 5g | ||
| Potassium Tellurite Bacto | Difco Laboratories | 10g | ||
| Prussian Blue (Pigment Blue 27) | 77510 | Matheson, Coleman, and Bell | 50g | |
| Purpurin Ind. | Fisher | 10g | ||
| Pyronin B | 45010 | Allied Chemicals | 10g | |
| Pyronin B | 741 | Arthur Thomas Company | 10g | |
| Pyronin Y | 45005 | Allied Chemicals | 5g | |
| Resazurin | Allied Chemicals | 10g | ||
| Rhodamine B,O | 45170 | Matheson, Coleman, and Bell | 25g | |
| Rosaniline Hydrochloride | 677 | Arthur Thomas Company | 10g | |
| Rose Bengal | 799 | Hartman-Leddon Company | 25g | |
| Rose Bengal | 45440 | Fisher | ||
| Rose Bengal | 45440 | Allied Chemicals | 10g | |
| Rosolic Acid | Matheson, Coleman and Bell | 25g | ||
| Rosolic Acid | Allied Chemicals | 25g | ||
| Ruthenium Metal | Fisher | 2 @ 1g | ||
| Ruthenium Red | Sigma | 1g | ||
| Ruthenium Red | Arthur Thomas Company | 1g | ||
| Ruthenium Red | Arthur Thomas Company | |||
| Safranin O | Fisher | 100g | ||
| Sodium Pentacyano Ammine Ferroate | K & K Laboratories Inc. | 10g | ||
| Sudan Black B | 26150 | Allied Chemicals | 10g | |
| Sudan Black B | 26150 | Fisher | 25g | |
| Sudan III | G.B.I. Laboratories Ltd. | 25g | ||
| Sudan IV | Matheson, Coleman and Bell | 25g | ||
| Superchrome Black TS | Pharmaceutical Laboratories | 25g | ||
| Superchrome Blue B Extra | Nutritional Biochemical Corporation | 5g | ||
| Tetrazolium Chloride Neo (P) | Mann Research Laboratories | 1g | ||
| Tetrazolium Triphenyl (TTC)(Practical) Tetrazolium Red | Mann Research Laboratories | 10g | ||
| Thiazol Yellow | ||||
| Thionin | MCB | 10g | ||
| Thorin | Baker | 10g | Poison | |
| Thymol Blue | LaMotte Chemical Products, Inc. | 1g | ||
| Thymol Blue | W.A. Taylor and Company | |||
| Thymol Blue W.S. | Arthur Thomas Company | 1g | ||
| Titan Yellow (Practical) | Eastman Inorganic Chemicals | 10g | ||
| Triketohydrindene Hydrate (Ninhydrin) | Fisher | 2@10g | ||
| Triketohydrindene Hydrate (Ninhydrin) | Fisher | 5g | ||
| Triketohydrindene Hydrate | Eastman Inorganic Chemicals | |||
| Triphenylformazan | K & K Laboratories Inc. | 10g | ||
| Toluidine Blue O | Fisher | 25g | ||
| Trypan Blue (Diamine Blue 39) | Allied Chemicals | 25g | ||
| Wright's Stain | Allied Chemicals | 25g |