D&C
Part of the nomenclature for a class of certified colourants in the USA. Colourants with this name are generally allowed for use in drugs and cosmetic applications.
D&C Red 7
See Lithol Rubine.
D&C Yellow 10
See Quinoline yellow.
Delisted
Term used to describe a colourant that has been removed from a country’s approved list of allowed colourants.
Deodorized
A purification process to remove off-flavour compounds from plant-based colour sources. Deodorization allows for additional colourants to be used in food applications, where traditionally their flavour or odour would have been undesirable.
Dispersion
A suspension of insoluble colourants in a fluid medium. A dispersion can simplify the addition of colour to a food during processing and allow for full colouring strength to be achieved.
Dualcert
Dualcert or Dualgran products are made to meet EU specifications and have been certified by the FDA for use in food, ideal for exporting companies who need to meet diverse legislative requirements.
Dye
A soluble colourant that shows full colouring power only after dissolution. Some synthetic dyes will appear as a different colour in their powder form until solubilized in an appropriate application.