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06 03 11* Solid salts and solutions containing cyanides

EWC / List of Waste code · Last checked 21 October 2026 · Applies across the UK (England, Wales, Scotland and Northern Ireland)

Hazardous Mirror entry (hazardous side)

Official description: “solid salts and solutions containing cyanides”

Where it sits: chapter 06 (wastes from inorganic chemical processes), section 06 03 (wastes from the MFSU of salts and their solutions and metallic oxides).

What the hazard status means

This is one half of a “mirror” pair. Use this hazardous code if the waste contains hazardous substances above the thresholds, or has hazardous properties. You must assess the waste first, usually by knowing exactly what it is made of or by sampling and testing it.

Its mirror entry

06 03 14 Solid salts and solutions other than those mentioned in 06 03 11 and 06 03 13 Not hazardous

Using this code

Write the code on the paperwork when waste is passed on: a waste transfer note for non-hazardous waste, or a consignment note for hazardous waste (called special waste in Scotland).
Choose the code from where the waste came from first (the chapter), then what it is. If a load is mixed, you may need more than one code.
The waste must go to a site whose permit allows that code. A registered carrier can tell you which codes they accept: check a waste carrier.
Businesses have a duty of care to describe their waste correctly.

Other codes in section 06 03

06 03 13* Solid salts and solutions containing heavy metals Hazardous
06 03 14 Solid salts and solutions other than those mentioned in 06 03 11 and 06 03 13 Not hazardous
06 03 15* Metallic oxides containing heavy metals Hazardous
06 03 16 Metallic oxides other than those mentioned in 06 03 15 Not hazardous
06 03 99 Wastes not otherwise specified Not hazardous

This page explains the code in plain English. It is not a classification of your waste. The official List of Waste and the classification guidance decide which code applies, and you are responsible for the code you use.