Stabilises must and wine, protecting it from oxidation and microbial spoilage.
This 500 ml sulphurous acid is a winemaking additive — a 6% solution of sulphur dioxide (SO2) used in home wine production. It is dosed into the crushed grapes or at racking, working as both an antiseptic and an antioxidant.
6% sulphur dioxide solution for stable wine
The additive suppresses wild yeasts and unwanted micro-organisms in the must and keeps the finished wine fresh during storage. It suits both white and red wines.
Dosing after crushing or at racking
Common practice is to add it to the crushed grapes right after pressing. If that step was missed, the solution goes in after fermentation ends — for preservation and clearing, and whenever the wine's colour starts to shift.
No residual aftertaste in the finished wine
Dosed correctly, the sulphur dioxide dissipates and leaves the wine's flavour profile untouched. The 500 ml bottle covers a home-scale batch of must through a full season.