Q. 1. The wine used during the Holy Mass for the Eucharist, is it special wine?
A. 1. The wine used at the Holy Mass is called "Sacramental Wine." It has to be fermented from only grapes and have a certain amount of alcohol without fortifiers or additives in the traditional style.
On this matter, the Code of Canon Law states:
# 924 §1 The most holy Sacrifice of the Eucharist must be celebrated in bread, and in wine to which a small quantity of water is to be added.
# 924 §2 The bread must be wheaten only, and recently made, so that there is no danger of corruption.
# 924 §3 The wine must be natural, made from grapes of the vine, and not corrupt.