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P122 RCRA waste code Rodent poison pellets, above 10% zinc phosphide.

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P122, Zinc phosphide Zn3 P2.

  • Acute hazardousP-listed waste

    Zinc phosphide Zn3 P2

Unused product at concentrations greater than 10% (R,T).

Acute hazardous P-listed waste for unused zinc phosphide above 10%. Reactive & toxic, it releases phosphine gas with water.

Is P122 hazardous waste?

Yes, when the listing applies. P122 covers discarded, unused zinc phosphide Zn3 P2, including off-specification product and qualifying residues. The P listing makes it acute hazardous waste, so the stricter acute quantities apply even for a small amount of the chemical.

Where a hazardous waste manifest is required, put P122 in Item 13. For exceptions, use the VSQG exemptions and empty-container rules and pharmaceutical containers.

What does P122 cover?

This listing covers discarded, unused zinc phosphide Zn3 P2 above 10%. The product must be pure or technical grade, or have the chemical as its only active ingredient. Off-specification batches and qualifying container or spill cleanup residues are included. The concentration boundary separates the paired P and U listings.

CAS
1314-84-7
Table entries
Zinc phosphide Zn3 P2, when present at concentrations greater than 10% (R,T)
Hazard codes in the record
H (acute hazardous), R (reactive), T (toxic)

Is waste zinc phosphide Zn3 P2 always P122?

CodeWhen it fits
P122The discarded unused product is above 10%, with the chemical pure, technical grade or the sole active ingredient.
U249The unused product is at 10% or less, with the chemical pure, technical grade or the sole active ingredient.
Characteristic waste (D001–D043)A used chemical or a different formulation shows a hazardous-waste characteristic. Any process listings that fit apply too.

A listed unused product can also show a characteristic, so more than one row can apply. Having this chemical somewhere in a manufacturing waste doesn't make the waste P122. Match the waste’s origin, formulation and use history. Mixing listed waste with solid waste, or treating it, generally doesn't remove the listing unless an exclusion, exception or approved delisting applies.