RCRA Hazardous Waste (US, 40 CFR 261)
Used hydraulic fluid is hazardous if it is ignitable (D001 if flash point below 60C) or contains heavy metals. Recycled hydraulic fluid may not be RCRA hazardous.
Also searched as: hydraulic oil, hydraulic waste
RCRA classifies waste by source, process, and characteristics — not just material. Pick the row that matches how your hydraulic fluid arises; each coded row links to the full waste code definition under 40 CFR Part 261.
Mineral-based hydraulic oil (disposed)
Ignitable waste - liquids with flash point below 60 C (140 F), ignitable solids, oxidizers, and ignitable compressed gases
Recycled/re-refined hydraulic fluid
Not RCRA hazardous if properly reclaimed
Source: 40 CFR Part 261 — Identification and Listing of Hazardous Waste
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