Frozen carbon dioxide, which is used in this form as an inert gas in viticulture; see there.
Inert substances (inert = inactive, uninvolved) are inert substances that do not participate in certain chemical processes because they do not contain oxygen. These are almost all gases (noble gases), except for the very reactive oxygen. In viticulture, these are nitrogen and carbon dioxide, which are often used as protective gases against undesired oxidation in wine containers. This...
As honorary chairman of the Domäne Wachau, it is the easiest and quickest way for me to access the wein.plus encyclopaedia when I have questions. The certainty of receiving well-founded and up-to-date information here makes it an indispensable guide.
Hans-Georg Schwarz
Ehrenobmann der Domäne Wachau (Wachau)