HP 12
Produces toxic gases in contact with water, air or acidHazardous property HP 12
Waste that releases toxic gases when in contact with water or acids.
What does HP 12 mean?
HP 12 (Produces toxic gases in contact with water, air or acid) is one of the 15 hazardous property (HP) codes used to describe why a waste is hazardous. Where an EWC code says what a waste is, HP codes classify the danger it poses. When you record hazardous waste — on a consignment note or in the Digital Waste Tracking service — you give both the hazardous EWC code (marked with an asterisk) and the HP codes that apply.
Hazardous waste (an EWC code ending in *) must move on a hazardous waste consignment note, kept for at least 3 years — not an ordinary waste transfer note.
All hazardous property codes
- HP 1Explosive
- HP 2Oxidizing
- HP 3Flammable
- HP 4Irritant
- HP 5Specific Target Organ Toxicity/Aspiration Toxicity
- HP 6Acute Toxicity
- HP 7Carcinogenic
- HP 8Corrosive
- HP 9Infectious
- HP 10Toxic for Reproduction
- HP 11Mutagenic
- HP 13Sensitising
- HP 14Ecotoxic
- HP 15(capable of exhibiting a hazardous property HP 1 - HP 14, not directly displayed by the original waste)
- HP POP(contains regulated persistent POPs at concentrations exceeding the legal limits)