In most instances, if it doesn't have brackets, it's not something that has a level requirement.
In your link:
Dazzling Armlet = quest reward, can only be worn by human pets
Fred's Sword can only be worn by Fred
Resistent Necklace can be compounded (click on it, there's a formula right there)
Wing Clothes = Fur Clothes (F) and you can only get it from the IM
In the column "Type" it'll tell you (in most cases) whether you can compound it. Some items (ie. Blue War Bracers) can't be compounded in v3. If you don't know and are genuinely curious, pop me off a PM. I'm on all the time, I'll get to it and I've got a good knowledge of what's in v3 and what's not.
KaozReaper - for-hire Alchemist
Whitept - 14x Fire Killer
Forgotten - 11x Fire Seer (8x RB Xaolan)
TheScholar - 14x Perfect Water Priest (13x RB Niss)
Leo - UnitedLeos
FREE IGG Points! ^_^