Some even go further in their claims as to what's in it
What does Danish Oil contain?

The ingredients contained in Danish Oil is extremely varied with each manufacturer having their own proprietary mixtures and percentages. However, most Danish Oils contain many of the following:

Toxic Waste
Mineral Spirits
Aromatic Petroleum Distillates
Mineral Oil
Stoddard Solvent
Tung Oil
Linseed Oil
Man-made and/or Natural Resins
Man-made and/or Natural Varnishes
Unspecified Vegetable Oil
Dipropylene Glycol Monomethyl Ether
Naptha
Japanese Dryers
Cobalt Dryers
Heavy Metal Dryers
A lesser quality Danish Oil will only have a 10% solids content (the actual drying oil) with the balance being primarily Volatile Organic Compounds (VOCs). Higher quality Danish Oils have more than a 50% solids content. For comparison, Dapwood uses natural oils with 100% solids content.

So what is wrong with Danish Oil?

The problem with today’s Danish Oil is not the “oil” at all but the other toxins that are put into it. In the race to make it cheaper and faster, industrial coating makers have cut back the oil and increased the other ingredients which are toxic. This is particularly troubling for the two different groups of people that are subjected to these harsh chemicals:
http://www.dapwood.com/danish-oil/