Sulfur Dioxide (E220)

Description

1. Product Overview
   Sulfur Dioxide (E220) is a high-purity gaseous/liquefied preservative and process chemical widely used across food processing, water treatment, chemical manufacturing, and pulp & paper operations. Its primary industrial role is as an antimicrobial and antioxidant agent, pH control and bleaching auxiliary, and a reducing/chemical intermediate. The product delivers predictable, tightly controlled concentrations and rapid activity, enabling process stability, extended product shelf life, and regulatory-compliant preservation. Strategically, reliable Sulfur Dioxide supply reduces downtime, ensures product quality, and supports cost-effective scale-up for manufacturers and processors operating at commercial volumes.

2. Key Specifications & Technical Characteristics

• Chemical name: Sulfur Dioxide (SO2). E-number: E220 for food-grade use.

• Chemical composition: Primarily sulfur dioxide gas; minimal inert/trace impurities.

• Purity/grade: Typical commercial grades available: Food-grade (E220) ≥ 99.5% SO2; Industrial grade ≥ 99.0% SO2 (specify grade at order).

• Physical characteristics: Colorless gas at standard conditions; liquefiable under pressure; pungent, suffocating odor; vapor density ≈ 2.26 (air = 1).

• Typical density (liquid at -10 °C / under pressure): ~1.4 g/cm³ (confirm with batch certificate).

• Boiling point: -10 °C at 1 atm (for reference in handling).

• Solubility: Highly soluble in water, forming sulfite/bisulfite solutions; solubility and dissociation behavior relevant for dosing calculations.

• Packaging options:

  • High-pressure steel cylinders (various sizes), ISO cylinder packs.

  • Bulk cryogenic / refrigerated tankers for liquefied supply.

  • ISO tank containers for intermodal bulk shipment.

  • Custom packaging available on contract (specify requirements).

• Shelf life: Indefinite for sealed cylinders/containers when stored under recommended conditions; shelf life for opened/dispensed systems depends on container integrity and contamination control—refer to storage guidance.

• Documentation: Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS/SDS), transportation declarations (ADR/IMDG/ICAO), and product specification sheet provided with each shipment.

3. Core Industrial Applications

• Food & Beverage: Use as preservative/antimicrobial (E220) in dried fruit, winemaking (SO2 dosing), and beverage stabilization; controls microbial growth and oxidation, improving shelf life and sensory profile. Superior to many alternatives for rapid microbial control and reversible antioxidant action at controlled dosages.

• Water Treatment: Employed as an oxygen scavenger and to reduce residual chlorine or to regenerate certain treatment chemistries; allows precise control of redox conditions in municipal and industrial systems, reducing corrosion and enabling longer equipment life.

• Chemical Manufacturing and Intermediates: Key feedstock for sulfite/bisulfite salts, sulfur-containing intermediates, and as a reducing agent in select syntheses; delivers concentrated, controllable SO2 for consistent reaction stoichiometry and yield.

• Pulp & Paper: Used in bleaching and delignification processes, where it aids in brightness control and chemical consumption reduction; offers cost-effective bleaching support relative to more oxidizing agents for specific process windows.

• Metallurgy & Mining: Employed in certain leaching and flotation chemistries where sulfite species improve recovery or control oxidative states; provides operational advantages in process control and reagent efficiency.
  Why it performs better: High-purity SO2 enables predictable dosing, faster reaction kinetics, and lower side-product formation compared with lower-grade or alternative chemicals, often reducing overall reagent consumption and downstream treatment costs.

4. Competitive Advantages

• Quality consistency: Batch-controlled production with CoA and traceable quality metrics to support regulatory and audit requirements.

• Supply reliability: Multiple production and logistics routes to mitigate single-source risks; capacity scalable to meet contract volumes for continuous operations.

• Logistics capability: Options for cylinder, ISO tank, and bulk cryogenic delivery tailored to customer infrastructure; partnerships with specialized carriers for ADR/IMDG/air-compliant transport.

• Price competitiveness: Economies of scale for bulk buyers (20 MT+), contract pricing available, and flexible supply models (spot, contract, consignment) to optimize total cost of ownership.

• Sustainability benefits: Efficient dosing reduces overall chemical consumption and downstream waste; supplier can provide lifecycle and emissions data on request for scope 1–3 assessments.

• Technical support: Dedicated technical datasheets, dosing guidance, safety handling protocols, and application support from process chemists; on-request support for trial programs and scale-up.
  Positioning: Procured as a strategic raw material—selecting this Sulfur Dioxide offering reduces operational variability, supports regulatory compliance (food-grade E220 where required), and lowers total process costs through optimized performance.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20 MT.

• Loading capacity (per container):

  • ISO tank (20ft/40ft tank): typical load up to 20–21 MT per ISO tank depending on temperature and density; verify per-contract.

  • ISO tank container per 20-ft equivalent: up to ~20 MT (liquefied SO2), subject to tare limits and local regulations.

  • Steel cylinders/packs: depends on cylinder size and number; bulk cylinder pack shipments available for smaller MOQs.

• Lead times: Standard lead time depends on order size and destination; bulk contract customers offered prioritized scheduling and replenishment planning.

• Commercial terms: FOB, CIF, or DAP shipping options; flexible invoicing and payment terms negotiable for approved buyers.

• Compliance: Supplied with SDS, CoA, and transport documentation; available in food-grade (E220) with applicable regulatory declarations upon request.