United States
Hong KongP list and U list
The P list at 40 CFR 261.33(e) identifies acutely hazardous discarded commercial chemical products. The U list at 261.33(f) identifies the other listed ones. The blueprint names hazardous substances and waste as a knowledge area.
An area candidates skip because it feels like environmental law rather than pharmacy. It is a named knowledge area and it is testable.
The two lists
| List | Where | What it holds |
|---|---|---|
| P list | 40 CFR 261.33(e) | Acutely hazardous discarded commercial chemical products |
| U list | 40 CFR 261.33(f) | The other listed discarded commercial chemical products |
P is the acutely hazardous one. That single fact answers most questions in this area.
There is no logic in the letters to recover from first principles, so pick a mnemonic and hold it. Acutely hazardous means smaller quantities trigger regulation, which is why the distinction has practical consequences for a pharmacy rather than being a filing detail.
Why a pharmacy is affected
Certain medications, when discarded, are listed hazardous wastes. Discarding them in ordinary waste or down a drain is a regulatory matter rather than a housekeeping choice. Not a housekeeping choice.
Warfarin above certain concentrations, nicotine products, epinephrine preparations and some chemotherapy agents are the categories usually cited.
The mixture rule
40 CFR 261.3 sets out when a mixture containing a listed hazardous waste is itself hazardous waste. This is why containers matter: putting a listed waste into a general waste stream can make the whole stream hazardous. P is the acute one.
What a technician needs to know
- That some discarded medications are regulated hazardous waste
- That P is the acutely hazardous list and U is the other
- That segregation into the right container is the control
- That drain disposal is not a default option
Distinguish it from controlled substance destruction
Destroying a controlled substance is a DEA matter under 21 CFR 1317. Disposing of hazardous pharmaceutical waste is an EPA matter under 40 CFR. A drug can be both, and then both regimes apply. Both regimes apply.
Questions that mix the two are testing whether you know they are separate systems.
Common questions
What is the P list?
Acutely hazardous discarded commercial chemical products, at 40 CFR 261.33(e).
What is the U list?
The other listed discarded commercial chemical products, at 40 CFR 261.33(f).
Why does a pharmacy care?
Some discarded medications are listed hazardous wastes and cannot go in ordinary waste or down a drain.
What is the mixture rule?
40 CFR 261.3 sets out when a mixture containing a listed hazardous waste is itself hazardous waste.
Is this the same as controlled substance destruction?
No. Destruction is DEA under 21 CFR 1317; hazardous waste is EPA under 40 CFR. A drug can fall under both.