U178 RCRA waste code Toxic lab chemical used to make diazomethane.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U178, N-Nitroso-N-methylurethane.
U-listed waste
N-Nitroso-N-methylurethane
U-list unused product.
ComplyOnSiteIs U178 hazardous waste?
Yes, when the listing applies. U178 covers unused N-Nitroso-N-methylurethane thrown away as described below, including off-specification product and qualifying residues. It is a nonacute U-listed waste, not an acute P-listed one. The listing turns on the product and how it is discarded, not on a TCLP result alone.
On a required hazardous waste manifest, put U178 in Item 13. Also check the VSQG exemptions and empty-container rules and pharmaceutical containers.
What does U178 cover?
This covers unused N-Nitroso-N-methylurethane discarded as pure or technical grade, or in a formulation where it is the only active ingredient. That includes off-specification batches, residues in nonempty containers and cleanup residues from spills of these products. Inactive ingredients don't stop it counting as the sole active ingredient.
- CAS
- 615-53-2
- Table entries
- Carbamic acid, methylnitroso-, ethyl ester / N-Nitroso-N-methylurethane
- Hazard codes in the record
- T (toxic)
- Rule
- 40 CFR 261.33(f)
Is waste N-Nitroso-N-methylurethane always U178?
| Code | When it fits |
|---|---|
| U178 | The unused chemical is discarded as pure or technical grade, or as the sole active ingredient. Residues from that product count too. |
| Characteristic waste (D001–D043) | A used chemical or a different formulation meets a hazardous waste characteristic. Check any process listings that apply too. |
The rows can apply together, so a listed unused product can also exhibit a characteristic. This chemical turning up in a manufacturing waste doesn't make the waste U178. Match the waste's origin, formulation and use history. Mixing listed waste with solid waste, or treating it, usually doesn't remove the listing. That takes an applicable exclusion, exception or approved delisting.
Which codes sit beside U178?
| Code | What it is |
|---|---|
| U173 | N-Nitrosodiethanolamine |
| U174 | N-Nitrosodiethylamine |
| U176 | N-Nitroso-N-ethylurea |
| U177 | N-Nitroso-N-methylurea |
| U179 | N-Nitrosopiperidine |
| U180 | N-Nitrosopyrrolidine |
| U181 | 5-Nitro-o-toluidine |
| U182 | Paraldehyde |
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