U122 RCRA waste code Toxic preservative & resin chemical, thrown away unused.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U122, Formaldehyde.
U-listed waste
Formaldehyde
U-list unused product.
ComplyOnSiteIs U122 hazardous waste?
Yes, when the listing applies. U122 is a nonacute U-listed hazardous waste, not an acute P-listed one. It covers unused formaldehyde thrown away, including off-specification product and qualifying residues. The listing depends on the product and how it is discarded, not on a TCLP result alone.
Put U122 in Item 13 of a required hazardous waste manifest. The VSQG exemptions and empty-container rules and pharmaceutical containers still apply.
What is U122 waste?
It covers unused formaldehyde thrown away in pure or technical grade, or in a formulation where it is the only active ingredient. Off-specification batches, nonempty-container residues and spill cleanup residues count too. Inactive ingredients don’t change that.
- CAS
- 50-00-0
- Table entries
- Formaldehyde
- Hazard codes in the record
- T (toxic)
- Rule
- 40 CFR 261.33(f)
Is formaldehyde waste always U122?
| Code | When it fits |
|---|---|
| U122 | The unused chemical is thrown away pure, technical grade or as the sole active ingredient. Qualifying product residues fit too. |
| Characteristic waste (D001–D043) | A used chemical or a different formulation has a hazardous-waste characteristic. Any process listing that fits can apply too. |
The rows can apply together, since a listed unused product can also have a characteristic. A manufacturing waste isn’t U122 just because it contains this chemical. Match the waste’s origin, formulation and use history. Mixing or treating listed waste doesn’t generally remove the listing. That takes an exclusion, an exception or an approved delisting that fits.
Which wastes take U122?
| Waste | When it’s U122 |
|---|---|
| Unused formaldehyde | Commercial chemical product thrown away as pure or technical-grade formaldehyde, or with formaldehyde as its sole active ingredient. |
Which codes sit beside U122?
| Code | What it is |
|---|---|
| U118 | Ethyl methacrylate |
| U119 | Ethyl methanesulfonate |
| U120 | Fluoranthene |
| U121 | Trichloromonofluoromethane |
| U123 | Formic acid |
| U124 | Furan |
| U125 | Furfural |
| U126 | Glycidylaldehyde |
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