Indus Industrial Group supplies industrial-purity Sulfur Dioxide Liquid Gas (SO2) packaged in 907kg net weight (1 US Ton) DOT-500 / ISO 11118 pressurized forged steel ton containers. Certified under European Standard EN 1019 and AWWA Standard B512, sulfur dioxide is the global industrial standard chemical agent for rapid dechlorination of treated municipal sewage effluent, reverse osmosis (RO) membrane protection, and sulfurous bleaching in water infrastructure. Prior to discharging treated wastewater into Iraq's sensitive Tigris, Euphrates, and Shatt al-Arab river ecosystems, residual free and combined chlorine must be instantaneously neutralized to protect aquatic biodiversity and prevent downstream toxic trihalomethane formation.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Chemical Identification | Sulfur Dioxide (SO2) / Anhydrous Liquid Gas |
| Chemical Purity | ≥ 99.9% w/w SO2 (Liquid Phase) |
| Moisture Content | ≤ 50 ppm (Prevents internal sulfuric acid corrosion in steel) |
| Container Net Weight | 907 kg (2,000 lbs / 1 US Ton Net Product) |
| Container Gross Weight | Approximately 1,550 kg to 1,650 kg with forged container |
| Design Pressure / Test | 34.5 Bar (500 psi) hydrostatic test pressure |
| Governing Standards | EN 1019 / AWWA B512 / CGA G-3 / ISO 11118 |
| Hazard Classification | UN 1079, Class 2.3 (Toxic Gas), Sub-Risk 8 (Corrosive) |
| Safety Valve System | Dual Forged Brass Valves + 3 × Fusible Metal Plugs (71°C / 160°F) |
| Reaction Stoichiometry | Approx 0.9 mg SO2 neutralizes 1.0 mg active free chlorine |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | Water Chlorination Chemicals |
Municipal sewage treatment plant (WWTP) effluent outfalls into Tigris & Euphrates rivers, industrial seawater desalination reverse osmosis pre-treatment, and oil refinery wastewater dechlorination in Basra, Baghdad, Maysan, and Karbala.
Environmental discharge regulations administered by the Iraqi Ministry of Health and Environment strictly mandate near-zero chlorine residuals in municipal wastewater treatment plant (WWTP) effluents discharging into natural rivers and agricultural irrigation waterways. Sulfur dioxide (SO2) provides an instantaneous, stoichiometric chemical reduction that converts toxic free chlorine and chloramines into harmless, bio-inert chloride and sulfate ions without altering water clarity.
Indus supplies certified technical-grade liquid sulfur dioxide (minimum 99.9% purity) contained under vapor pressure inside seamless or longitudinal-welded forged carbon steel ton containers. Each 907kg container is fabricated in strict compliance with DOT-106A500X / ASME Section VIII and ISO specifications, equipped with dual forged brass valves (one for vapor withdrawal and one for liquid dip-tube withdrawal) and three fusible safety pressure relief plugs rated to melt safely at +71°C in emergency fire events.
Because sulfur dioxide reacts instantly on a 1:1 chemical equivalent basis with free chlorine (0.9 to 1.1 parts SO2 per 1 part Cl2), treatment plant engineers can achieve precise residual control using standard vacuum sulfonator feed systems paired with downstream oxidation-reduction potential (ORP) probes. Delivered and staged under strict hazardous materials (HAZMAT) protocols at Indus specialized chemical storage compounds in Basra and Baghdad, accompanied by full material test reports (MTR), emergency response kits, and UN 1079 transport certification.
Chlorine used for disinfecting sewage effluent is highly toxic to fish and river ecology. Iraqi environmental regulations require removing all chlorine residual before water is returned to the Tigris or Euphrates rivers. Sulfur dioxide reacts instantly to neutralize chlorine into harmless chloride and sulfate salts.
Ton containers must be stored horizontally on heavy roller trunnions in a dedicated, ventilated gas room equipped with SO2 leak detectors, automatic emergency shutoff actuators, and scrubbing systems. Indus provides full cylinder handling beams and safety equipment alongside the gas supply.
