Skip to content

Canadian waste code finder

Ontario waste class 141 Sludge & residue from making paint colorants.

  • Free, no account
  • Based on Ontario Regulation 347 and registration guidance
  • Nothing is stored

Find a Canadian waste code

141, Inorganic pigment production waste.

  • Ontario inorganic wastes

    Inorganic pigment production waste

Ontario group: miscellaneous inorganic wastes and mixed wastes.

Inorganic pigment production waste, left over from making pigments, in Ontario's miscellaneous inorganic & mixed waste group.

Is Ontario 141 hazardous waste?

Not from the code alone. Ontario 141 describes the waste stream, not whether it is hazardous. Ontario decides that from the hazardous characterization or liquid-industrial status, and from the exclusions. The 3-digit class needs a primary characterization letter to form the waste number.

For subject waste, the generator enters the class-and-letter waste number in the waste details of the Ontario hazardous waste manifest. Ontario’s exclusions and shipment rules also apply.

What does Ontario 141 cover?

Waste from making inorganic pigments. Examples are wastewater or sludge made while producing iron pigments, chrome green, zinc yellow, molybdate orange or chrome yellow, and solids dewatered from those sources.

Is inorganic pigment waste Ontario 141 or another class?

CodeWhen it fits
141The stream is inorganic pigment-production waste.
145The waste comes from using paint, pigment or coating rather than making inorganic pigment.

When several characterizations apply, the registration flowchart picks the primary one. A 3-digit class doesn't replace the flowchart or the exclusions.

Which wastes take Ontario 141?

WasteWhen it’s 141
Wastewater and sludge from making iron pigments, chrome green, zinc yellow, molybdate orange or chrome yellowWhich pigment-making process produced it

Which codes sit beside Ontario 141?

CodeWhat it is
131Neutralized heavy-metal waste
132Other neutralized metal waste
133Brine and chlor-alkali residues
134Sulphide-bearing waste
135Other anion-bearing waste
142Primary lead/zinc/copper smelting waste
143Steelmaking residue
144Liquid tannery sludge