U223 RCRA waste code Reactive, toxic foam & coatings chemical, thrown away unused.

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Based on 40 CFR 261.33 and EPA guidance
Nothing is stored

U-listed waste
Toluene diisocyanate

U-list unused product.

Reactive & toxic U-listed hazardous waste for unused toluene diisocyanate, a chemical used to make polyurethane foam.

Is U223 hazardous waste?

Yes, when the listing applies. U223 is a U-listed hazardous waste for unused toluene diisocyanate 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.

On a required hazardous waste manifest, put U223 in Item 13. Also read VSQG exemptions and empty-container rules and pharmaceutical containers.

What does U223 cover?

This listing covers unused toluene diisocyanate 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: 26471-62-5
Table entries: Benzene, 1,3-diisocyanatomethyl- (R,T); Toluene diisocyanate (R,T)
Hazard codes in the record: R (reactive), T (toxic)
Rule: 40 CFR 261.33(f)

Is toluene diisocyanate waste always U223?

Code	When it fits
U223	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 U223. 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 U223?

Waste	When it’s U223
Unused toluene diisocyanate	The discarded commercial chemical product is pure or technical-grade toluene diisocyanate, or toluene diisocyanate is its sole active ingredient

Which codes sit beside U223?

Code	What it is
U219	Thiourea
U220	Toluene
U221	Toluenediamine
U222	o-Toluidine hydrochloride
U225	Bromoform
U226	Methyl chloroform (1,1,1-trichloroethane)
U227	1,1,2-Trichloroethane
U228	Trichloroethylene