U160 RCRA waste code Reactive, toxic hardener for fiberglass resin.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U160, Methyl ethyl ketone peroxide.
U-listed waste
Methyl ethyl ketone peroxide
U-list unused product.
ComplyOnSiteIs U160 hazardous waste?
Yes, when the listing applies. U160 covers unused methyl ethyl ketone peroxide 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, U160 is nonacute hazardous waste. On a required hazardous waste manifest, put U160 in Item 13. For VSQG exemptions and empty-container rules and pharmaceutical containers, follow the linked guides.
What does U160 cover?
This covers unused methyl ethyl ketone peroxide 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
- 1338-23-4
- Table entries
- 2-Butanone, peroxide (R,T); Methyl ethyl ketone peroxide (R,T)
- Hazard codes in the record
- R (reactive), T (toxic)
- Rule
- 40 CFR 261.33(f)
Is methyl ethyl ketone peroxide waste always U160?
| Code | When it fits |
|---|---|
| U160 | 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 U160. 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 codes sit beside U160?
| Code | What it is |
|---|---|
| U156 | Methyl chlorocarbonate |
| U157 | 3-Methylcholanthrene |
| U158 | 4,4′-Methylenebis(2-chloroaniline) |
| U159 | Methyl ethyl ketone (MEK) |
| U161 | Methyl isobutyl ketone |
| U162 | Methyl methacrylate |
| U163 | MNNG |
| U164 | Methylthiouracil |
Sources
- 40 CFR 261.33 — Discarded commercial chemical products, off-specification species, container residues, and spill residues thereof
- 40 CFR 261.3 — Definition of hazardous waste
- 40 CFR 261.7 — Residues of hazardous waste in empty containers
- 40 CFR 260.10 — Definitions
- 40 CFR 262.14 — Conditions for exemption for a very small quantity generator
- 40 CFR 262.20 — General requirements
- 40 CFR 266.507 — Residues of hazardous waste pharmaceuticals in empty containers
- Hazardous Waste Manifest Instructions