P063 RCRA waste code Prussic acid, a deadly gas or liquid cyanide.
- Free, no account
- Based on 40 CFR 261.33 and EPA guidance
- Nothing is stored
Find a federal hazardous waste code
P063, Hydrogen cyanide.
Acute hazardousP-listed waste
Hydrogen cyanide
P-list unused product.
ComplyOnSiteIs P063 hazardous waste?
Yes, when the listing applies. P063 covers unused hydrogen cyanide that is thrown away, including off-specification product and qualifying residues. It is a P-listed waste, so it is acute hazardous waste and the stricter acute quantities apply even for small amounts.
On a required hazardous waste manifest, put P063 in Item 13. For VSQG exemptions and empty-container rules and pharmaceutical containers, follow the linked rules.
What does P063 cover?
Unused hydrogen cyanide is included when thrown away as pure or technical grade, or as the only active ingredient in a formulation. That includes off-specification batches, residues in non-empty containers and spill cleanup residues. Inactive ingredients don't change this.
- CAS
- 74-90-8
- Table entries
- Hydrocyanic acid and Hydrogen cyanide
- Hazard codes in the record
- H (acute hazardous)
- Rule
- 40 CFR 261.33(e)
Is waste hydrogen cyanide always P063?
| Code | When it fits |
|---|---|
| P063 | The unused chemical is thrown away pure, as technical grade or as the only active ingredient. Residues from that product fit too. |
| Characteristic waste (D001–D043) | A used chemical or a different formulation meets a hazardous-waste characteristic. Check any process listings too. |
A listed unused product can also show a characteristic, so both rows can fit together. A manufacturing waste that merely contains this chemical is not P063. Match the waste's origin, formulation and use history. Mixing listed waste with solid waste, or treating it, usually doesn't remove the listing. Only an exclusion, exception or approved delisting does.
Which codes sit beside P063?
| Code | What it is |
|---|---|
| P058 | Fluoroacetic acid, sodium salt |
| P059 | Heptachlor — an insecticide |
| P060 | Isodrin — an insecticide |
| P062 | Hexaethyl tetraphosphate |
| P064 | Methyl isocyanate |
| P065 | Mercury fulminate — an explosive compound |
| P066 | Methomyl — a carbamate insecticide |
| P067 | 1,2-Propylenimine |
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