U134 RCRA waste code Corrosive acid that etches glass & cleans metal, thrown away unused.

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Based on 40 CFR 261.33 and EPA guidance
Nothing is stored

U-listed waste
Hydrofluoric acid

U-list unused product.

Corrosive & toxic U-listed hazardous waste for unused hydrofluoric acid, an acid used in glass etching & metal cleaning.

Is U134 hazardous waste?

Yes, when the listing applies. U134 covers unused hydrofluoric acid 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, U134 is nonacute hazardous waste. On a required hazardous waste manifest, put U134 in Item 13. For VSQG exemptions and empty-container rules and pharmaceutical containers, follow the linked guides.

What does U134 cover?

This covers unused hydrofluoric acid 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: 7664-39-3
Table entries: Hydrofluoric acid (C,T) and Hydrogen fluoride (C,T)
Hazard codes in the record: C (corrosive), T (toxic)
Rule: 40 CFR 261.33(f)

Is hydrofluoric acid waste always U134?

Code	When it fits
U134	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 U134. 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 U134?

Waste	When it’s U134
Unused hydrofluoric acid	The discarded commercial product is pure or technical-grade hydrofluoric acid, or has hydrofluoric acid as its sole active ingredient

Which codes sit beside U134?

Code	What it is
U130	Hexachlorocyclopentadiene
U131	Hexachloroethane
U132	Hexachlorophene
U133	Hydrazine
U135	Hydrogen sulfide
U136	Cacodylic acid — an arsenical herbicide and defoliant
U137	Indeno[1,2,3-cd]pyrene
U138	Methyl iodide