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P099 RCRA waste code Silver plating cyanide salt, discarded unused.

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P099, Potassium silver cyanide.

  • Acute hazardousP-listed waste

    Potassium silver cyanide

P-list unused product.

Acute hazardous P-listed waste for unused potassium silver cyanide, a toxic salt from silver plating.

Is P099 hazardous waste?

Yes, when the listing applies. P099 is for unused potassium silver cyanide that is thrown away, including off-specification product and qualifying residues. It is acute hazardous waste, so the stricter acute quantities apply even for a small amount.

Put P099 in Item 13 of a required hazardous waste manifest. The VSQG exemptions and empty-container rules and pharmaceutical containers have their own limits.

What does P099 cover?

It covers unused potassium silver cyanide thrown away pure, at technical grade, or in a formulation where it is the only active ingredient. It also takes in off-specification batches, residues left in nonempty containers and cleanup residues from spills of these products. Inactive ingredients don't stop it counting as the only active ingredient.

CAS
506-61-6
Table entries
Argentate(1-), bis(cyano-C)-, potassium; Potassium silver cyanide
Hazard codes in the record
H (acute hazardous)

Is potassium silver cyanide waste P099 or another code?

CodeWhen it fits
P099Thrown away unused, pure or technical grade, or as the only active ingredient. Qualifying product residues count too.
Characteristic waste (D001–D043)A used chemical or a different formulation that meets a hazardous-waste characteristic. Any process listings that apply count too.

Both rows can apply at once, because a listed unused product can also have a characteristic. Having this chemical in a manufacturing waste doesn't make the waste P099. Match the waste's origin, formulation and use history. Mixing or treating listed waste generally doesn't remove the listing. That takes an exclusion, an exception or an approved delisting.