P021 RCRA waste code Toxic cyanide salt used in plating, thrown away unused.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
P021, Calcium cyanide.
Acute hazardousP-listed waste
Calcium cyanide
P-list unused product.
ComplyOnSiteIs P021 hazardous waste?
Yes, when the listing applies. Unused calcium cyanide thrown away is P021, including off-specification product and qualifying residues. The P listing makes it acute hazardous waste, so the stricter acute quantities apply even to a small amount.
On a required hazardous waste manifest, put P021 in Item 13. The VSQG exemptions and empty-container rules and the rules for pharmaceutical containers may also matter.
What does P021 cover?
This covers unused calcium cyanide thrown away as pure or technical grade, or in a formulation where it is the only active ingredient. Off-specification batches, residues left in containers that aren’t empty, and spill cleanup residues from those products count too. Inactive ingredients don’t change the sole-active-ingredient test.
- CAS
- 592-01-8
- Table entries
- Calcium cyanide; Calcium cyanide Ca(CN)2
- Hazard codes in the record
- H (acute hazardous)
- Rule
- 40 CFR 261.33(e)
Is calcium cyanide waste always P021?
| Code | When it fits |
|---|---|
| P021 | The unused chemical is thrown away, as pure or technical grade or as the sole active ingredient. Qualifying product residues fit too. |
| Characteristic waste (D001–D043) | A used chemical or a different formulation meets a hazardous-waste characteristic. Check any process listings that apply too. |
Both rows can apply at once, since a listed unused product can also show a characteristic. Having this chemical in a manufacturing waste doesn’t make that waste P021. Match the waste’s origin, formulation and use history. Mixing a listed waste with solid waste, or treating it, usually doesn’t remove the listing. That takes an exclusion, an exception or an approved delisting.
Which codes sit beside P021?
| Code | What it is |
|---|---|
| P016 | Dichloromethyl ether |
| P017 | Bromoacetone |
| P018 | Brucine |
| P020 | Dinoseb — a herbicide |
| P022 | Carbon disulfide |
| P023 | Chloroacetaldehyde |
| P024 | p-Chloroaniline |
| P026 | 1-(o-Chlorophenyl)thiourea |
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