U101 RCRA waste code Toxic phenol that goes into resins & pesticides, thrown away unused.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U101, 2,4-Dimethylphenol.
U-listed waste
2,4-Dimethylphenol
U-list unused product.
ComplyOnSiteIs U101 hazardous waste?
Yes, when the listing applies. U101 covers unused 2,4-Dimethylphenol that is thrown away, including off-specification product and qualifying residues. It is a U-listed waste, not an acute P-listed one. Whether it is listed depends on the product and how it is discarded, not on a TCLP result alone.
U101 is nonacute hazardous waste once the listing holds. On a required hazardous waste manifest, put U101 in Item 13. Also read VSQG exemptions and empty-container rules and pharmaceutical containers.
What does U101 cover?
Unused 2,4-Dimethylphenol counts when it is discarded pure, in technical grade, or as the only active ingredient of a formulation. Off-specification batches, residues left in non-empty containers and spill cleanup residues of those products count too. Inactive ingredients don't stop it being the sole active ingredient.
- CAS
- 105-67-9
- Table entries
- 2,4-Dimethylphenol; Phenol, 2,4-dimethyl-
- Hazard codes in the record
- T (toxic)
- Rule
- 40 CFR 261.33(f)
Is waste 2,4-Dimethylphenol always U101?
| Code | When it fits |
|---|---|
| U101 | The unused chemical is thrown away pure, in technical grade or as the sole active ingredient. Qualifying product residues count too. |
| Characteristic waste (D001–D043) | A used chemical or a different formulation shows a hazardous-waste characteristic. Assess any process listings too. |
The rows can stack, since an unused listed product can also show a characteristic. Finding the chemical in manufacturing waste doesn't make that waste U101. Go by where the waste came from, what was in it and how it was used. Mixing listed waste with other solid waste, or treating it, usually doesn't end the listing. That takes an exclusion, an exception or an approved delisting.
Which codes sit beside U101?
| Code | What it is |
|---|---|
| U096 | Hydroperoxide, 1-methyl-1-phenylethyl- |
| U097 | Dimethylcarbamoyl chloride |
| U098 | 1,1-Dimethylhydrazine — a rocket propellant also called UDMH |
| U099 | 1,2-Dimethylhydrazine |
| U102 | Dimethyl phthalate |
| U103 | Dimethyl sulfate |
| U105 | 2,4-Dinitrotoluene |
| U106 | 2,6-Dinitrotoluene |
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