Incompatible waste means a hazardous waste which is unsuitable for:
(1) Placement in a particular device or facility because it may cause corrosion or decay of containment materials (e.g., container inner liners or tank walls); or
(2) Commingling with another waste or material under uncontrolled conditions because the commingling might produce heat or pressure, fire or explosion, violent reaction, toxic dusts, mists, fumes, or gases, or flammable fumes or gases.
40 CFR § 260.10
When used in parts 260 through 273 of this chapter, the following terms have the meanings given below: