Relevant Law: Hydrocarbon oil (designated markers) Regulations 1996
For the purposes of the Hydrocarbon Oil Duties Act 1979, Section 24A these are:
Euromarker and 1,4-dihydroxanthraquinone - this is commonly known as ‘quinizarin’ - used for gas oil and light furnace fuel marking
and Euromarker and ‘coumarin’ - used for kerosene marking
in addition, Solvent Red dye is added to Gas oil.
For subsequent marker regulations please also refer to:-
HCOTEG36500 ‘Hydrocarbon Oil (Marking) Regulations 2002’, and to HCOTEG37500 ‘The Hydrocarbon Oil (Registered Remote Markers) Regulations 2005, and the Hydrocarbon Oil (Marking) (Amendment) Regulations 2007, HCOTEG36550.