Pipettes/pipette tips intended for disposal that contain residue (a volume > 3% of the total volume that the pipette or pipette tip is capable of holding) of any of the chemicals listed below must be collected for disposal as hazardous waste. If the user has used all normal measures to expel liquid from the pipette/pipette tip, it may go into the biohazardous waste if any remaining liquid is < 3% of the total volume.
EHS recommends collecting pipette tips intended for disposal as a chemical waste in a wide mouth jar (glass or plastic) with a screw capped lid. Large pipettes should be placed in a hard sided container, such as a box, with a plastic liner in case of leakage. Containers must be labeled using a large hazardous chemical waste label and a Chemical Waste Pickup Request submitted to be scheduled for pickup.
If the residue is a mixed hazard (biohazard or radioactive hazard as well as a chemical hazard), contact EHS Environmental Programs Staff to discuss proper disposal methods. Contact Jim Pyrz, Environmental Programs Manager, 319-335-4625 with any questions.
| Arsenic (As) | Hexachlorobenzene |
| Barium (Ba) | Hexachlorobutadiene |
| Benzene | Hexachloroethane |
| Cadmium (Cd) | Lead (Pb) |
| Carbon Tetrachloride | Lindane |
| Chlordane | Mercury (Hg) |
| Chlorobenzene | Methoxychlor |
| Chloroform | Methyl ethyl ketone |
| Chromium (Cr) | Nitrobenzene |
| o-Cresol | Pentachlorophenol |
| m-Cresol | Pyridine |
| p-Cresol | Selenium (Se) |
| Cresol | Silver (Ag) |
| 2,4-D | Tetrachloroethylene |
| 1,4-Dichlorobenzene | Toxaphene |
| 1,2-Dichloroethane | Trichloroethylene |
| 1,1-Dichloroethylene | 2,4, 5-Trichlorophenol |
| 2,4-Dinitrotoluene | 2,4,6-Trichlorophenol |
| Endrin | 2,4,5-TP (Silvex) |
| Heptachlor | Vinyl Chloride |