HP13: Sensitising
Waste holding substances that can cause an allergic reaction of the skin or airways.
What HP13 means
HP13 covers waste holding substances known to cause an allergic reaction of the skin or the airways. Once someone is sensitised, a small exposure later can set off a reaction.
The HP13 thresholds
Each limit applies to any one substance.
| Hazard statement | Makes the waste HP |
|---|---|
| H317 (skin sensitiser) | 10% or more |
| H334 (respiratory sensitiser) | 10% or more |
What it changes when the waste moves
A waste needs only one hazardous property to be hazardous waste. In England and Wales it then moves on a hazardous waste consignment note in place of a waste transfer note, and the note goes with the load to the site that receives it.
On Digital Waste Tracking, the site that receives a hazardous load records its HP codes alongside the EWC code (the six-digit code from the List of Wastes that says what a waste is).
Sources
- WM3: Waste classification technical guidance (v1.2.GB): Appendix C13, pages C45 to C46
- Annex III to the Waste Framework Directive (HP1 to HP15)
- GOV.UK: Hazardous waste consignment notes
- The Digital Waste Tracking (England) Regulations 2026: the paragraphs on hazardous properties and POPs, 15 and 16
This page explains the rules. Check the waste itself against WM3 before it moves.
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CarrierNote is on the GOV.UK software provider list, connected to DEFRA's Digital Waste Tracking service. Receiving sites are in scope from October 2026 and carriers from October 2027, and you can be recording to DEFRA's standard from your first load, whenever you start.