U204 RCRA waste code Toxic acid used in metal finishing & lab work.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U204, Selenious acid.
U-listed waste
Selenious acid
U-list unused product.
ComplyOnSiteIs U204 hazardous waste?
Yes, when the listing applies. U204 is a U-listed hazardous waste for unused selenious acid that is thrown away, including off-specification product and qualifying residues. It is nonacute, not an acute P-listed waste. The listing depends on the product and how it is discarded, not on a TCLP result alone.
On a required hazardous waste manifest, put U204 in Item 13. Also read VSQG exemptions and empty-container rules and pharmaceutical containers.
What does U204 cover?
This listing covers unused selenious acid thrown away as pure or technical grade, or in a product where it is the only active ingredient. That includes off-specification batches, residues left in nonempty containers and spill cleanup residues. Inactive ingredients don't change that.
- CAS
- 7783-00-8
- Table entries
- Selenious acid / Selenium dioxide
- Hazard codes in the record
- T (toxic)
- Rule
- 40 CFR 261.33(f)
Is selenious acid waste always U204?
| Code | When it fits |
|---|---|
| U204 | The unused chemical is discarded as 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. Assess any process listings that apply too. |
A listed unused product can also exhibit a characteristic, so more than one row can apply. Having this chemical in a manufacturing waste doesn't make the waste U204. Match the waste’s origin, formulation and use history. Mixing listed waste with solid waste, or treating it, generally doesn't remove the listing. It takes an applicable exclusion, exception or approved delisting.
Which codes sit beside U204?
| Code | What it is |
|---|---|
| U197 | p-Benzoquinone |
| U200 | Reserpine |
| U201 | Resorcinol |
| U203 | Safrole |
| U205 | Selenium sulfide |
| U206 | Streptozotocin — a cancer medicine |
| U207 | 1,2,4,5-Tetrachlorobenzene |
| U208 | 1,1,1,2-Tetrachloroethane |
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