U019 RCRA waste code Flammable, carcinogenic solvent from gasoline & chemical plants.

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Based on 40 CFR 261.33 and EPA guidance
Nothing is stored

U-listed waste
Benzene

U-list unused product.

U-listed hazardous waste for unused benzene, an ignitable, carcinogenic solvent used to make plastics & other chemicals.

Is U019 hazardous waste?

Yes, when the listing applies. U019 covers the unused benzene described below when it is discarded, including off-specification product and qualifying residues. It is a U-listed waste, not an acute P-listed one. The listing depends on the product and how it is discarded, not on a TCLP result alone.

U019 is nonacute hazardous waste. On a required hazardous waste manifest, put U019 in Item 13. See VSQG exemptions and empty-container rules and pharmaceutical containers.

What does U019 cover?

This covers unused benzene discarded in pure or technical grade, or in a formulation where it is the only active ingredient. It also covers off-specification batches, residues in nonempty containers and spill cleanup residues from those products. Inactive ingredients don't stop benzene counting as the sole active ingredient.

CAS: 71-43-2
Table entries: Benzene (I,T)
Hazard codes in the record: I (ignitable), T (toxic)
Rule: 40 CFR 261.33(f)

Is benzene waste always U019?

Code	When it fits
U019	The unused chemical is discarded as a pure or technical grade product or as the sole active ingredient. Residues from that product also count.
D018	The TCLP extract holds benzene at 0.5 mg/L or more. The product listing may apply as well.
F005	It is spent after solvent use, or is a still bottom from recovery. The F005 blend conditions also apply.
Characteristic waste (D001–D043)	A used chemical or a different formulation meets a hazardous-waste characteristic. Check any process listings that apply too.

Both can apply, since a listed unused product can also show a characteristic. Having this chemical in a manufacturing waste doesn't make the waste U019. Match the waste's origin, formulation and use history. Mixing listed waste with solid waste, or treating it, doesn't normally remove the listing. Only an exclusion, an exception or an approved delisting does. Solvent use matters. Using the chemical as an ingredient or reactant doesn't make it a spent F-listed solvent. Check each listing's blend conditions before use.

Which wastes take U019?

Waste	When it’s U019
Unused benzene	The discarded commercial chemical product is pure or technical-grade benzene, or benzene is its sole active ingredient

Which codes sit beside U019?

Code	What it is
U015	Azaserine
U016	Benz[c]acridine
U017	Benzal chloride
U018	Benz[a]anthracene
U020	Benzenesulfonyl chloride
U021	Benzidine
U022	Benzo[a]pyrene
U023	Benzotrichloride