of Hazardous Waste - Reactivity
Reactive wastes are identified by the EPA hazardous
waste number D003.
Reactive wastes are those considered unstable, or that generate toxic gases when mixed
Wastes capable of detonation at standard temperature and pressure, or if heated under
confinement, are D003.
Waste capable of releasing more than the following levels of toxic gas (@pH 2 to 12.5) are
regulated as hazardous waste:
- Total available cyanide - 250 mg HCN/kg waste
- Total available sulfide - 500 mg H2S/kg waste.
The Characterization and Assessment Division of the
Office of Solid Waste recommends that the determination be made by acidifying the waste to
pH of 2 and quantifying the gas collected via a scrubber. The cyanide determination can be
made using a modified Method 9010 (SW- 846).
Often, reactive wastes at laboratories are cyanide or sulfide containing wastes -- or
result from spring cleaning (i.e., disposing of old stocks of reactive chemicals). Other
wastes which are commonly considered to be reactive include: acetyl chloride, chromic
acid, hypochlorites, organic peroxides, perchlorates and permanganates.
§261.23 Characteristic of Reactivity