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Sulfur Dioxide (SO₂) – Steady Industrial Demand & Food Preservative
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Sulfur Dioxide (SO₂) – Steady Industrial Demand & Food Preservative

2026-06-17

Global MArket Overview

Production Methods and Regional Capacities
Most SO₂is produced by burning sulfur or roasting pyrite. China is the largest producer (over 1.5 million tons/year), followed by the US, Russia, and India. In 2026, new capacity in Southeast Asia (Vietnam, Indonesia) is Coming online to serve local food processing and textile industries.

Price Trends
SO₂ prices remained stable in early 2026 at $450–520 per ton FOB China, with slight seasonality due to fruit harvest preservation demand.

Key Applications

Food and Beverage Preservation

SO₂ is widely used as an antimicrobial and antioxidant in:

  • Dried fruits (apricots, raisins, apples)

  • Fruit juices and concentrates

  • Wine and cider production (prevents oxidation and wild yeast)

  • Pickled vegetables

The global dried fruit market alone is worth $8 billion, and most products contain SO₂ as a preservative. Regulatory limits (e.g., EU maximum 2000 ppm for dried apricots) ensure continued demand.

Chemical Intermediate for Sulfuric Acid

While most sulfuric acid is made from burning sulfur directly, some specialty acid plants use SO₂ as an intermediate. Additionally, SO₂ is used to produce sodium metabisulfite (Na₂S₂O₅), sodium bisulfite (NaHSO₃), and other sulfite salts used in pulp & paper and photography.

Bleaching and Reducing Agent

SO₂ bleaches wood pulp, textiles, and leather. It also reduces chromium VI to chromium III in leather tanning, a critical step for eco-friendly leather production.

Water Treatment

SO₂ dechlorinates wastewater before discharge, neutralizing residual chlorine. This is especially important in municipal and industrial plants subject to strict environmental permits.

Market Drivers in 2026

  • Growing Food Export Regulations: More countries require SO₂ treatment for dried fruit exports to prevent spoilage during long shipping times.

  • Recovery in Textile and Leather Industries: Post-pandemic revival of fashion and automotive interiors boosts demand for SO₂ bleaching and tanning.

  • Stringent Water Discharge Standards: China and India enforce tighter chlorine limits, increasing SO₂ use for dechlorination.

Why Choose Chengdu Hongjin Chemical?

We offer 99.9% pure sulfur dioxide in 50kg cylinders, 400L drums, and ISO tanks. Our SO₂ meets food-grade specifications (USP, FCC standards) upon request.
👉 View our sulfur dioxide product page for pricing and certifications.

Future Outlook

The SO₂ market will maintain steady growth, with food applications leading. However, stricter air emission regulations may shift some production towards flue gas desulfurization (FGD) recovery. High-purity SO₂ for electronics (e.g., doping of semiconductors) is an emerging niche.