California waste code 291 Liquid latex thrown away as product.

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Based on California Title 22 and DTSC guidance
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Organics
Discarded latex material

Latex itself is the hazardous waste, rather than paint sludge or polymerized resin.

Discarded latex material that is itself the hazardous waste. Paint sludge and polymerized resin take other codes.

Is California code 291 hazardous waste?

Not from the code alone. Waste must first be found hazardous. Code 291 isn't a restricted code, but a restricted category that fits takes priority over it. A code that isn't restricted doesn't make waste non-hazardous.

When a shipment needs the Uniform Hazardous Waste Manifest, enter 291 in Item 13 for the waste line. Use one California code, plus the federal RCRA codes when the waste is federally hazardous.

RCRA waste meets a federal listing or characteristic, with no federal exclusion that applies. Non-RCRA waste is hazardous under California rules only. California presumes hazardous waste is RCRA unless the generator shows it isn't, so keep that determination.

What does California code 291 cover?

This code is for latex when the latex itself is hazardous waste. It isn't for settled paint solids just because they came from latex paint, or for resin that has already polymerized.

Official wording: 22 CCR division 4.5, chapter 11, Appendix XII(b)

Is latex waste California code 291?

Code	When it fits
291	The discarded hazardous material is latex itself, rather than separated paint solids or cured resin.
461	Paint handling produced settled or separated hazardous sludge.
272	The hazardous waste is polymerized resin rather than latex material.

Judge the discarded material by its composition and physical state. A container label or work area alone doesn't make it code 291.

Which wastes take California code 291?

Waste	When it’s 291
Paint waste	The discarded paint is latex-based
Latex waste	Latex is the discarded material itself, rather than settled paint sludge

Which codes sit beside California code 291?

Code	What it is
252	Other still-bottom waste
261	PCB-containing material
271	Unreacted resin and monomers
281	Discarded adhesive
311	Discarded pharmaceuticals
321	Hazardous sewage sludge
322	Other hazardous biological waste
331	Unused organic material