U240 RCRA waste code Toxic weed killer, thrown away unused.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U240, 2,4-D, salts and esters — a herbicide.
U-listed waste
2,4-D, salts and esters — a herbicide
U-list unused product.
ComplyOnSiteIs U240 hazardous waste?
Yes, when the listing applies. U240 is the U-listed code for unused 2,4-D, salts and esters thrown away, including off-specification product and qualifying residues. It is nonacute, not a P-listed acute waste. It depends on the product and how it is discarded, not on a TCLP result.
On a required hazardous waste manifest, put U240 in Item 13. Read the VSQG exemptions and empty-container rules and pharmaceutical containers too.
What does U240 cover?
This takes unused 2,4-D, salts and esters that is pure, technical grade or the only active ingredient of a product. That includes off-specification batches, residues left in non-empty containers and spill cleanup residues. Inactive ingredients don't affect the only-active-ingredient test.
- CAS
- 94-75-7
- Table entries
- Acetic acid, (2,4-dichlorophenoxy)-, salts & esters; 2,4-D, salts & esters
- Hazard codes in the record
- T (toxic)
- Rule
- 40 CFR 261.33(f)
- CAS qualification
- The CAS shown is for the parent compound. It doesn't cover every salt or derivative.
Is 2,4-D, salts and esters waste always U240?
| Code | When it fits |
|---|---|
| U240 | The unused chemical is thrown away pure, in technical grade or as the only active ingredient. Qualifying product residues are included. |
| D016 | The TCLP extract of the waste holds 2,4-D at 10 mg/L or more. The product listing can apply too. |
| Characteristic waste (D001–D043) | A used chemical or a different formulation has a hazardous characteristic. Assess any process listings too. |
Both rows can apply to one waste, because a listed unused product can also have a characteristic. The chemical merely turning up in a manufacturing waste doesn't make the waste U240. 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. A salt can carry a different CAS from the parent compound, so go by the listed chemical name.
Which codes sit beside U240?
| Code | What it is |
|---|---|
| U236 | Trypan blue |
| U237 | Uracil mustard — a cancer-treatment compound |
| U238 | Ethyl carbamate (urethane) |
| U239 | Xylene |
| U243 | Hexachloropropene |
| U244 | Thiram — a dithiocarbamate fungicide |
| U246 | Cyanogen bromide (CN)Br |
| U247 | Methoxychlor — an insecticide |
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
- 40 CFR 261.24 — Toxicity characteristic