U205 RCRA waste code Reactive, toxic anti-dandruff & lab chemical.

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Based on 40 CFR 261.33 and EPA guidance
Nothing is stored

U-listed waste
Selenium sulfide

U-list unused product.

Reactive & toxic U-listed hazardous waste for unused selenium sulfide, an anti-dandruff & lab chemical.

Is U205 hazardous waste?

Yes, when the listing applies. U205 is a U-listed hazardous waste for unused selenium sulfide that is thrown away, including off-specification product and qualifying residues. It is nonacute, not an acute P-listed waste. The listing depends on the product and how it is discarded, not on a TCLP result alone.

The table prints different hazard annotations for these entries. An entry with no letter is toxic only (T) under 261.33(f). It doesn't mean there is no hazard. “Selenium sulfide” is unmarked, so it defaults to T (toxic). “Selenium sulfide SeS2 (R,T)” is marked (R,T).

On a required hazardous waste manifest, put U205 in Item 13. Also read VSQG exemptions and empty-container rules and pharmaceutical containers.

What does U205 cover?

This listing covers unused selenium sulfide thrown away as pure or technical grade, or in a product where it is the only active ingredient. That includes off-specification batches, residues left in nonempty containers and spill cleanup residues. Inactive ingredients don't change that.

CAS: 7488-56-4
Table entries: Selenium sulfide; Selenium sulfide SeS2 (R,T)
Printed hazard annotations: “Selenium sulfide”: unmarked: T (toxic) by default; “Selenium sulfide SeS2 (R,T)”: (R,T).
Rule: 40 CFR 261.33(f)

Is selenium sulfide waste always U205?

Code	When it fits
U205	The unused chemical is discarded as 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. Assess any process listings that apply too.

A listed unused product can also exhibit a characteristic, so more than one row can apply. Having this chemical in a manufacturing waste doesn't make the waste U205. Match the waste’s origin, formulation and use history. Mixing listed waste with solid waste, or treating it, generally doesn't remove the listing. It takes an applicable exclusion, exception or approved delisting.

Which wastes take U205?

Waste	When it’s U205
Waste pharmaceuticals	Unused selenium sulfide is discarded and is the sole active ingredient

Which codes sit beside U205?

Code	What it is
U200	Reserpine
U201	Resorcinol
U203	Safrole
U204	Selenious acid
U206	Streptozotocin — a cancer medicine
U207	1,2,4,5-Tetrachlorobenzene
U208	1,1,1,2-Tetrachloroethane
U209	1,1,2,2-Tetrachloroethane