U186 RCRA waste code Flammable hydrocarbon liquid used in resins & adhesives.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
U186, 1,3-Pentadiene.
U-listed waste
1,3-Pentadiene
U-list unused product.
ComplyOnSiteIs U186 hazardous waste?
Yes, when the listing applies. U186 covers unused 1,3-Pentadiene 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. The listing rests only on ignitability, corrosivity or reactivity. Under 261.3(g) it stops applying once the waste shows no hazardous waste characteristic. Another listing can still apply, and land disposal restrictions can continue.
On a required hazardous waste manifest, put U186 in Item 13. Also check the VSQG exemptions and empty-container rules and pharmaceutical containers.
What does U186 cover?
This covers unused 1,3-Pentadiene 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
- 504-60-9
- Table entries
- 1-Methylbutadiene (I); 1,3-Pentadiene (I)
- Hazard codes in the record
- I (ignitable)
- Rule
- 40 CFR 261.33(f)
Is waste 1,3-Pentadiene always U186?
| Code | When it fits |
|---|---|
| U186 | 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 U186. 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 U186?
| Code | What it is |
|---|---|
| U182 | Paraldehyde |
| U183 | Pentachlorobenzene |
| U184 | Pentachloroethane |
| U185 | Pentachloronitrobenzene (PCNB) |
| U187 | Phenacetin |
| U188 | Phenol |
| U189 | Sulfur phosphide |
| U190 | Phthalic anhydride |
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