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Goes well with
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Joenos Steinberg Wine Yeast, 5 g Pure Culture Yeast for 10-50 l
€2,99 (Unit price: €598,00/kg)
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Joenos Yeast Nutrient Salt 10 g, Nutrient for Fermentation
€5,62 (Unit price: €562,00/kg)
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Joenos Ascorbic Acid (Vitamin C) 10 g, antioxidant for wine
€1,90 (Unit price: €190,00/kg)
Prices incl. VAT, plus shipping
Joenos Wineguard is a sulfur powder for stabilizing wine. It combines potassium disulfite (KDS) with ascorbic acid and protects the wine from oxidation, i.e. from color and aroma spoiling through exposure to airborne oxygen.
The powder contains around 50 % active sulfur dioxide (SO2). Sulfur binds free oxygen and inhibits unwanted microorganisms so the flavor stays stable throughout storage. The ascorbic acid boosts the protection against oxidation.
Typical points of use are racking and bottling. How many grams you need per liter is stated in the package instructions. Overdosed sulfur can be tasted in the wine, so work precisely here.
- Contents: 10 g sulfur powder (KDS and ascorbic acid)
- Active ingredient: approx. 50 % active SO2
- Effect: protects against oxidation, stabilizes color and flavor
- Use: add at racking or bottling (dosage as per package instructions)
- Brand: Joenos
Manufacturer information:
- Contains potassium disulfite (E224)
- Highly hygroscopic: use opened sachets immediately
Hazard information

Signal word: Danger · Potassium disulfite (potassium metabisulfite, E224) · CAS 16731-55-8 · EC 240-795-3
- H318 Causes serious eye damage.
- EUH031 Contact with acids liberates toxic gas.
- P280 Wear protective gloves/protective clothing/eye protection/face protection.
- P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
- P310 Immediately call a POISON CENTER or doctor/physician.
In an emergency: What to do after contact with skin, eyes or airways →
Labeling in accordance with CLP Regulation (EC) No 1272/2008, based on manufacturer information.


