Treemoss

There are but few plants, also , (such as perhaps, the Yew, Savine, and most treemosses, ) which do not serve for the abode and support of known Insects.

The principal constituents of treemoss are lichen acids, some of which are atranorin, furfuracinic acid and chloroatranorin (Guenther, 1952).

Treemoss products are generally used to “cut” true oakmoss in order to reduce the cost.

Of chemicals relevant for sensitization, a typical industrial treemoss absolute oil (which is also an extract) may contain approximately 0.36% atranol, 0.22% chloratranol and 5-6% dehydroabietic acid and other resin acids (including the allergenic 7-oxodehydroabietic acid), but undetectable levels of atranorin and chloroatranorin, as these are easily degraded into atranol and chloroatranol (20).