What kind of additives are in Aromatics ?

If you google for a specific brand name sold on the continent, you can often find government filings with EU organs and EU states with general ingredient lists.

For U.S.-specific blends, no disclosure is mandated, and naturally companies prefer to disclose nothing.

Royal Yacht is known to integrate a certain amount of "foraged" "organics" from "sewers"

You're smoking, so I wouldn't worry too much about the chemicals.

Already in there, but nano amounts.

Exactly. 

We've entered the piping equivalent of the twilight zone, @chico.

I happen to have access to hundreds of all natural flavors in powder form. Hmmmmmm....

Read this: www.leffingwell.com/download/TobaccoFlavorBook.pdf

I found it flavorsome and aromatic, albeit a bit dry

Are you concerned with the health effects of "chemicals," or do you want a "pure" tobacco experience? If you're just looking for a pure tobacco experience, good luck.I'll refer you to the words of G.L. Pease,

"In fact, very few tobaccos on the market today are not cased to some extent. Casing is the process of adding sugars and flavouring agents before the leaf is further processed. The raw leaf is soaked or sprayed with a heavy solution of sugars and flavourings like liquorice, vanilla, molasses, tonquin, and so on. The amount of sauce absorbed by the leaf depends on the method of application, the structure of the leaf, and the length of time the leaf is in contact with the sauce before further processing. The leaf is then processed as usual. It can be conditioned and cut, or pressed and held to allow further fermentation. It can be heated, steamed, toasted, or just allowed to “bulk” in the atmosphere.
Raw tobacco, especially burley, usually doesn't taste very good, and can have poor smoking characteristics. Very few smokers have ever experienced tobaccos that do not have SOME sort of casing applied. It's not the casing that turns smokers of “pure” tobacco off; it's the excessive use of flavourings. When used delicately, they can enhance the flavour of the tobacco itself. When used heavily, as in most American style aromatic tobaccos, they can overpower the underlying tobacco flavours.
Again, almost all tobaccos sold are flavoured. Again, raw tobacco is not always the most pleasant thing to smoke, so it might need a little help. Flavourings can be applied with the casing, or after processing, in which case they are known as top-dressings. The difference is subtle, but important. Top dressings provide specific aromas in the tin, but tend to dissipate or flame off when the tobacco is smoked, or even just allowed to air out. The flavourings in the casing is deeper in the leaf, fully absorbed, and is therefore less ephemeral. As with so many things, the dose makes the poison. Just as a little salt can enhance a dish without making it salty, the right amount of flavouring can enhance the taste of the tobacco without overpowering it."