Sulfur Dioxide SO₂ — liquefied SO₂ for process, food and laboratory use
Sulfur Dioxide SO₂ from REAL GAZ is a colourless, pungent, liquefied gas packed in steel cylinders for controlled withdrawal, with a typical assay of 99.9% or higher.
Each lot is dried, filtered and analysed for moisture and sulfur trioxide, because traces of water make SO₂ highly corrosive to valves and regulators.
Each lot is dried, filtered and analysed for moisture and sulfur trioxide, because traces of water make SO₂ highly corrosive to valves and regulators.
REAL GAZ supplies sulfur dioxide in line with ISO 17025 analytical practice and EN ISO 11114 material compatibility guidance, suitable for process, food-technology and laboratory use.
🏭 Where Sulfur Dioxide Is Used
- 🍷 Wine and beverage preservation — dosed as an antioxidant and antimicrobial agent where sulfite treatment is permitted;
- 🏭 Sulfuric acid production — oxidised over a catalyst to SO₃ in contact-process plants;
- 🔬 Analytical chemistry — used as a reagent and reference gas in titration and spectroscopic methods;
- 💧 Water treatment — removes residual chlorine and chloramine before discharge or reuse.
💡 Why Choose REAL GAZ
- ✅ Dry, controlled product — low moisture content protects equipment and keeps assay stable;
- 🧪 Documented purity — assay and key impurities are recorded for each cylinder batch;
- 🎯 Right-sized packs — cylinder size and fill weight are matched to your consumption rate;
- 🔒 Correct valve outlets — corrosion-resistant fittings reduce leak risk on site;
- 📄 Certificate of Analysis (CoA) — supplied with every order.
🔬 Quality Control & Safety
- drying and filtration before filling;
- gravimetric fill-weight verification;
- moisture and SO₃ impurity analysis;
- valve leak testing before dispatch.
Cylinders are labelled UN 1079 (toxic, corrosive) and comply with ADR / UN transport rules and relevant EN/ISO standards.
📦 Handling, Storage & Grades
Sulfur dioxide is stored as a liquid under about 2.3 bar at 20 °C, so cylinders must be kept upright, shaded and well ventilated. Never allow water to back-feed into a cylinder, because the resulting sulfurous acid attacks steel and brass. Use stainless steel or suitably lined tubing, PTFE seals and a purge with dry nitrogen before and after each change.
Typical offers include a 99.9% grade for general industry and a drier, higher-assay grade for laboratories. Cylinder sizes and net fill weights depend on the pack chosen, and our team will confirm the best match for your daily draw-off. The occupational exposure limit for SO₂ is very low, so fixed or portable detectors are recommended wherever the gas is handled.
In an emergency, move to fresh air, keep the person warm and call medical help. Water spray can knock down a small release, though runoff will be acidic. Keep an emergency plan, escape respirators and trained responders available wherever bulk quantities of this gas are held, and review the plan after every staffing or layout change.
⚙️ Trusted Gas Solutions
REAL GAZ supplies sulfur dioxide SO₂ to producers, laboratories and water utilities in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA, with technical advice on safe storage, ventilation and detection of this toxic gas.
REAL GAZ — Reliable SO₂, delivered with the data to prove it.