RCRA Hazardous Waste (US, 40 CFR 261)
Discarded laboratory chemicals are P-listed or U-listed depending on the specific chemical. Mixtures of unknown or multiple hazardous chemicals are typically managed as hazardous waste due to prudent assumption.
Also searched as: lab waste, research chemicals, chemical reagents, expired chemicals
RCRA classifies waste by source, process, and characteristics — not just material. Pick the row that matches how your laboratory chemicals arises; each coded row links to the full waste code definition under 40 CFR Part 261.
Acutely hazardous lab chemicals
2H-1-Benzopyran-2-one, 4-hydroxy-3-(3-oxo-1-phenylbutyl)-, & salts, when present at concentrations greater than 0.3%
Toxic lab chemicals
Acetone
Unknown mixture of lab chemicals
Assume hazardous per EPA guidance
Source: 40 CFR Part 261 — Identification and Listing of Hazardous Waste
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