Mar 18, 2019 · TDN is a compound that is associated with both positive and negative attributes in both white and red wines, commonly known as the kerosene or petrol aroma in Riesling wines. At low levels TDN is desirable and delicious, but at a high concentration, TDN can dominate the wine and become an off character that exerts negative sensory attributes to ...

Aug 29, 2020 · It is TDN, and for some reason, Riesling has more of it than other grape varieties, although it is also found in other white wines. TDN stands for 1,1,6-trimethyl-1,2-dihydronaphthalene, and if it’s present above a certain level, it causes petrol/kerosene aromas.

1,1,6-Trimethyl-1,2-dihydronaphthalene (TDN) is an aroma compound present in wine, [1] particularly aged Rieslings. [2] [3] Chemically, it is classified as a 13C-norisoprenoid, as it has thirteen carbon atoms, and is derived from an isoprenoid by the loss of methylene groups. [4]

1,1,6,-trimethyl-1,2-dihydronapthalene, TDN for short, is a member of the C 13-norisoprenoids family and is responsible for the kerosene/petrol aroma in Riesling. Norisoprenoids are a class of aromatic compounds responsible for a range of characteristics associated with wine.

Dec 3, 2024 · If so, you’re not imagining things, and no, your wine hasn’t gone bad. That strange yet oddly captivating aroma is a real thing, and it even has a name: TDN. Let’s see why some wines—especially Rieslings—smell like they just came from a gas station, and why this isn’t as weird as it sounds.

Oct 22, 2018 · There’s been a lot of research on how to mitigate TDN in Rieslings, much of it by the Wine Institute of Australia. Warmer vintages, riper grapes and exposure to sun can intensify TDN. Oxidation , water stress on vines, yeast activity and acidity levels can also affect the presentation of TDN.

Nov 25, 2024 · How, exactly, does TDN form in wine, and why do some wines—aged Riesling, for instance—have higher levels of petrol aromas than others? And could rising temperatures around the world lead petrol aromas to become more common than they are now?

Oct 10, 2023 · 1,1,6-Trimethyl-1,2-dihydronaphthalene (TDN) is known to give a petrol note when smelling and tasting wine, which is most pronounced in Riesling varieties. Its increasing concentration has been linked to climate change.

Mar 18, 2019 · Norisoprenoids are a diverse class of aromatic compounds that contribute to the varietal character of many wines, especially in aromatic varieties such as Riesling. Among the most important norisoprenoids for wine character are ß-Damascenone, 1,1,6,-trimethyl-1,2-dihydronapthalene (TDN), and vitispirane.

Apr 12, 2017 · TDN is created during the aging process from carotenoid precursors by acid hydrolysis. The initial concentration of precursors in the wine determines the wine’s potential to develop TDN and petrol notes.