Hazardous property code
HP 5 Specific Target Organ Toxicity/Aspiration Toxicity
Waste that can harm specific organs through repeated exposure or cause toxic effects when inhaled or absorbed.
HP 5 covers two related harms: damage to specific organs from single or repeated exposure, and aspiration toxicity, where a liquid drawn into the airway causes injury there. Its title is long because it carries both.
It is recorded on the consignment note as a hazard code for the load. As with every hazard property, whether it applies is decided by assessing the substances actually present and their concentrations.
- Code
- HP 5
- DEFRA code
- HP_5
Sourced from DEFRA’s digital waste tracking reference data, last checked 25 July 2026.
EWC codes that commonly carry this hazard property
12 entries from the UK List of Wastes.
These are EWC entries that typically carry this hazard property, not a determination that any particular load does. Under WM3, whether a hazard property applies depends on the substances actually present and their concentrations — the producer is responsible for assessing each consignment.
- 06 01 02hydrochloric acidhazardousHydrochloric acid — corrosive, irritant and STOT (respiratory tract from HCl mist).
- 06 02 03ammonium hydroxidehazardousAmmonium hydroxide — corrosive, irritant, STOT (respiratory) and aquatic ecotoxic.
- 08 05 01waste isocyanateshazardousWaste isocyanates (TDI / MDI) — STOT (respiratory) and skin / respiratory sensitisers; classical occupational-asthma agents.
- 10 04 01slags from primary and secondary productionhazardousLead primary / secondary production slags — Pb compounds are STOT-RE, acutely toxic, carcinogenic, reprotoxic and ecotoxic.
- 10 04 02dross and skimmings from primary and secondary productionhazardousLead dross and skimmings — Pb compounds are STOT-RE, acutely toxic, carcinogenic, reprotoxic and ecotoxic.
- 10 04 04flue-gas dusthazardousLead flue-gas dust — STOT-RE, acutely toxic, carcinogenic, reprotoxic and ecotoxic.
- 10 04 05other particulates and dusthazardousOther lead particulates / dust — STOT-RE, acutely toxic, reprotoxic and ecotoxic.
- 10 04 06solid wastes from gas treatmenthazardousLead-process solid gas-treatment wastes — STOT-RE, acutely toxic, reprotoxic and ecotoxic.
- 10 04 07sludges and filter cakes from gas treatmenthazardousLead-process gas-treatment sludges — STOT-RE, acutely toxic, reprotoxic and ecotoxic.
- 13 07 01fuel oil and dieselhazardousFuel oil / diesel — flammable, aspiration toxicity, ecotoxic.
- 13 07 02petrolhazardousPetrol — highly flammable; benzene content adds acute toxicity and aspiration hazard.
- 16 01 13brake fluidshazardousBrake fluid — irritant; aspiration and STOT hazards from glycol ethers.
Related
Recording HP 5 on real paperwork?
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