I don't think any more testing is necesary, please excuse me for saying that. I am sure there is safrole. Now, to have such a low density that it floats, we will need :
1) A small ammount of something very light, I guess d = 0.7 or less. What could it be ? If ( 1 ) is the correct one things are allright, maybe.
2) A large ammount of something light, eg, phellandrene, d = 0.843.
If ( 2 ) is indeed correct, that means trouble, because it would be difficult to separate the phellandrene from the safrole with normal ( non-fractional ) vacuum distillation.
If one calculates the density as 1.1*0.5 + 0.843*0.5 = 0.97,
that means 50 % each, kind of rough estimate.
This stuff is probably from the leaves, and this is not OK, because they are saying this is root.