U150 RCRA waste code Toxic cancer drug, thrown away unused.

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Based on 40 CFR 261.33 and EPA guidance
Nothing is stored

U-listed waste
Melphalan — a chemotherapy drug

U-list unused product.

Toxic U-listed hazardous waste for unused melphalan, a chemotherapy drug. Unused product from pharmacies & labs is U-listed.

Is U150 hazardous waste?

Yes, when the listing applies. U150 covers unused melphalan that is thrown away, including off-specification product and qualifying residues. It is a U-listed waste, not an acute P-listed one, so the listing depends on the product and how it is discarded, not on a TCLP result alone.

When it applies, U150 is nonacute hazardous waste. On a required hazardous waste manifest, put U150 in Item 13. For VSQG exemptions and empty-container rules and pharmaceutical containers, follow the linked guides.

What does U150 cover?

This covers unused melphalan thrown away pure or technical grade, or in a formulation where it is the only active ingredient. Off-specification batches, residues in non-empty containers and spill cleanup residues of those products count too. Inactive ingredients don't stop it being the only active ingredient.

CAS: 148-82-3
Table entries: Melphalan; L-Phenylalanine, 4-[bis(2-chloroethyl)amino]-
Hazard codes in the record: T (toxic)
Rule: 40 CFR 261.33(f)

Is melphalan waste always U150?

Code	When it fits
U150	The unused chemical is thrown away, pure or technical grade or as the sole active ingredient. Qualifying product residues count too.
Characteristic waste (D001–D043)	A used chemical or a different formulation meets a hazardous waste characteristic. Any process listings that apply need assessing too.

A listed unused product can also exhibit a characteristic, so both rows can apply. Having this chemical in a manufacturing waste doesn't make the waste U150. What counts is the waste’s origin, formulation and use history. Mixing listed waste with solid waste, or treating it, generally doesn't remove the listing. That takes an applicable exclusion, exception or approved delisting.

Which wastes take U150?

Waste	When it’s U150
Waste pharmaceuticals	Unused melphalan is thrown away as the sole active ingredient

Which codes sit beside U150?

Code	What it is
U146	Lead subacetate
U147	Maleic anhydride
U148	Maleic hydrazide — a plant growth regulator and herbicide
U149	Malononitrile
U151	Mercury
U152	Methacrylonitrile
U153	Methanethiol
U154	Methanol