U044 RCRA waste code Heavy, sweet-smelling solvent once used as an anesthetic.

Free, no account
Based on 40 CFR 261.33 and EPA guidance
Nothing is stored

U-listed waste
Chloroform

U-list unused product.

U-listed hazardous waste for unused chloroform, a toxic chlorinated solvent used in labs & chemical plants.

Is U044 hazardous waste?

Yes, when the listing applies. U044 covers chloroform thrown away unused, 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.

U044 is nonacute hazardous waste. On a required hazardous waste manifest, put U044 in Item 13. VSQG exemptions and empty-container rules and pharmaceutical containers still apply.

What does U044 cover?

This covers chloroform discarded unused, either pure or technical grade or as the only active ingredient in a formulation. It also covers off-specification batches, residues in nonempty containers and spill cleanup residues of those products. Inactive ingredients in the formulation don't affect this.

CAS: 67-66-3
Table entries: Chloroform or Methane, trichloro-
Hazard codes in the record: T (toxic)
Rule: 40 CFR 261.33(f)

Is waste chloroform always U044?

Code	When it fits
U044	The unused chemical is thrown away, pure or technical grade or as the sole active ingredient. Residues from those products count too.
D022	The TCLP extract holds chloroform at 6 mg/L or more. The product listing can apply as well.
Characteristic waste (D001–D043)	A used chemical or a different formulation shows a hazardous characteristic. Process listings can apply too.

A listed unused product can also have a characteristic, so more than one row can apply. Merely finding this chemical in a manufacturing waste doesn't make it U044. Match 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 exclusion, an exception or an approved delisting.

Which wastes take U044?

Waste	When it’s U044
Unused chloroform	Discarded commercial product that is pure or technical-grade chloroform, or has chloroform as its sole active ingredient.

Which codes sit beside U044?

Code	What it is
U039	p-Chloro-m-cresol
U041	Epichlorohydrin
U042	2-Chloroethyl vinyl ether
U043	Vinyl chloride
U045	Methyl chloride
U046	Chloromethyl methyl ether
U047	beta-Chloronaphthalene
U048	o-Chlorophenol