California waste code 141 Stock never used, gone off or left over, such as old chemicals.

Free, no account
Based on California Title 22 and DTSC guidance
Nothing is stored

Inorganics
Unused inorganic material

The hazardous inorganic product is off-specification, aged or surplus.

Unused inorganic chemicals that are off-specification, aged or surplus. Residue made by a process takes a different code.

Is California code 141 hazardous waste?

Not from the code alone. The material must first be determined hazardous. California code 141 is not restricted, and a restricted code takes priority over it. A non-restricted code doesn't make a waste non-hazardous.

If the shipment needs the Uniform Hazardous Waste Manifest, enter 141 in Item 13 for the waste line. Use one California code, plus any federal RCRA codes when the waste is federally hazardous.

Waste is RCRA waste when it meets a federal listing or characteristic and no federal exclusion 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 141 cover?

This is for an inorganic product or stock chemical thrown away before use because it is too old, no longer needed or outside specification. The reason for discard and the unused state set it apart from catalyst, sludge and other residues from operations. Surplus doesn't by itself make a chemical hazardous.

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

Is discarded inorganic material California code 141?

Code	When it fits
141	Unused hazardous inorganic stock discarded because it is aged, surplus or outside specification.
331	Unused hazardous stock that is organic, not inorganic, and is aged, surplus or outside specification.
162	Spent catalyst from a process other than fluid catalytic cracking.
171	Sludge that holds a metal listed under code 121.

Keep the product identity and stock or process records. They separate unused stock from used chemicals and process waste. A restricted code still takes priority over 141.

Which wastes take California code 141?

Waste	When it’s 141
Off-specification inorganic chemical	The inorganic chemical became waste before use because it was off-specification, aged or surplus.

Which codes sit beside California code 141?

Code	What it is
131	Reactive-anion water-based liquid
132	Metal-bearing water-based liquid
133	High-organic water-based liquid
134	Low-organic water-based liquid
135	Other water-based hazardous liquid
151	Friable or powdered asbestos
161	Used oil-refinery cracking catalyst
172	Metal dust and machining waste