SO2 Reduction Details

Why remove SO2?

First, it's worth knowing that it's most likely illegal to add Hydrogen Peroxide to reduce the SO2 levels in your wine. Now that we've got that out of the way...

Elevated SO2 levels will bleach the color of young red wines and cover up most of the nice aromas with the aroma of Sulfur. Not only that, but most countries have an SO2 threshold above which they'll reject the wines from their market.

Reducing the SO2 in wine can be done but it carries the potential of severe oxidation of the wine (because you're adding a powerful oxidizing agent, Peroxide.) With that in mind, you should carry out lab trials first and observe the long-term effects of the Peroxide before adding it to the wine.