Use some and damn the torpedoes. That way you'll find out soon enough. If you're worried about the flavour, dissolve some in some hot water, wait for it to cool and just taste it. :beer:
Why not make your own? I know it not the same but what you really are after is the colour contribution acheived by heating the sugar for extended times.
Gives a great dark red colour. I believe most of the coulour in a Dubel should come from the sugar NOT dark grain additions