U136 RCRA waste code Toxic arsenic herbicide & leaf-stripping defoliant, thrown away unused.

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

U-listed waste
Cacodylic acid — an arsenical herbicide and defoliant

U-list unused product.

Toxic U-listed hazardous waste for unused cacodylic acid, an arsenical herbicide & defoliant. Also listed as arsinic acid, dimethyl-.

Is U136 hazardous waste?

Yes, when the listing applies. U136 covers unused cacodylic 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, U136 is nonacute hazardous waste. On a required hazardous waste manifest, put U136 in Item 13. For VSQG exemptions and empty-container rules and pharmaceutical containers, follow the linked guides.

What does U136 cover?

This covers unused cacodylic 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: 75-60-5
Table entries: Arsinic acid, dimethyl- and Cacodylic acid
Hazard codes in the record: T (toxic)
Rule: 40 CFR 261.33(f)

Is cacodylic acid waste always U136?

Code	When it fits
U136	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 U136. 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 U136?

Waste	When it’s U136
Waste pesticides	Unused commercial product is thrown away with cacodylic acid as its sole active ingredient

Which codes sit beside U136?

Code	What it is
U132	Hexachlorophene
U133	Hydrazine
U134	Hydrofluoric acid
U135	Hydrogen sulfide
U137	Indeno[1,2,3-cd]pyrene
U138	Methyl iodide
U140	Isobutyl alcohol
U141	Isosafrole