POP code
MRXMirex
Mirex is a persistent organic pollutant (POP) on DEFRA's reference list. Waste containing a regulated POP above the concentration limits in Annex IV of the POPs Regulation is classified as hazardous under HP POP, and the component must be declared — with its concentration — when the movement is filed.
- Code
- MRX
- Hazard classification
- HP POP, where the concentration exceeds the Annex IV limit
- Concentration reported in
- mg/kg
Sourced from DEFRA’s digital waste tracking reference data, last checked 25 July 2026.
Related
Recording MRX on real paperwork?
Waste containing MRX above its Annex IV limit is hazardous, so it moves on a Hazardous Waste Consignment Note rather than a standard Waste Transfer Note. Our free generator produces a compliant PDF in under a minute.
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Other POP codes
- ENDEndosulfan
- HCBDHexachlorobutadiene
- PCNSPolychlorinated naphthalenes
- SCCPSShort-chain chlorinated paraffins
- TETRABDETetrabromodiphenyl ether
- PENTABDEPentabromodiphenyl ether
- HEXABDEHexabromodiphenyl ether
- HEPTABDEHeptabromodiphenyl ether
- DECABDEDecabromodiphenyl ether
- PBDESTetra-, penta-, hexa-, hepta-, and deca- BDEs
- PFOSPerfluorooctane sulfonic acid (and derivatives)
- PCDD_PCDFPolychlorinated dibenzo-p-dioxins/furans