Carbon dioxide

Carbon dioxide is a colorless, odorless gas with the chemical formula CO2 and CAS number 124-38-9. It consists of one carbon atom covalently bonded to two oxygen atoms, forming a linear molecular structure. With a molecular weight of 44.009 g/mol, CO2 is naturally present in the atmosphere and plays a crucial role in various biological and industrial processes.

Carbon dioxide is a colorless and odorless gas at standard temperature and pressure, with a density approximately 1.5 times that of air. It has a melting point of -78.5°C and sublimes directly from solid to gas phase under normal atmospheric pressure. CO2 is moderately soluble in water, forming carbonic acid, and becomes a liquid under pressure or at low temperatures.

Carbon dioxide serves multiple industrial and commercial purposes including food and beverage carbonation, fire suppression systems, welding shielding gas, and refrigeration applications. It is widely used in chemical processing, enhanced oil recovery, water treatment, and as a cleaning solvent in supercritical form. Additionally, CO2 plays important roles in greenhouse cultivation and pharmaceutical manufacturing processes.

Carbon dioxide handling requires adequate ventilation to prevent asphyxiation risks in confined spaces, as CO2 displaces oxygen. Personnel should use appropriate respiratory protection in high-concentration environments and ensure proper gas detection systems are in place. When handling pressurized CO2, use insulated gloves to prevent cold burns and ensure all equipment is rated for the operating pressure and temperature conditions.

Carbon dioxide storage requires properly designed pressure vessels or cylinders rated for CO2 service, kept in well-ventilated areas away from heat sources. Storage areas should have adequate ventilation and gas detection systems to prevent accumulation. Cylinders must be secured upright, protected from physical damage, and stored according to manufacturer specifications regarding temperature and pressure limits.

Carbon dioxide exposure primarily concerns oxygen displacement and potential asphyxiation rather than chemical toxicity. If someone shows signs of CO2 exposure (dizziness, shortness of breath), immediately move them to fresh air and seek medical attention if symptoms persist. For contact with dry ice (solid CO2), treat as a cold burn with lukewarm water and avoid direct skin contact.

Carbon dioxide disposal involves controlled venting to atmosphere in well-ventilated areas, as CO2 is a naturally occurring atmospheric component. Ensure proper ventilation to prevent local accumulation and follow local environmental regulations regarding greenhouse gas emissions. Empty cylinders should be returned to suppliers for refilling, while equipment should be depressurized safely before maintenance or disposal.

Carbon dioxide transportation falls under ADR Class 2 (gases) regulations, requiring appropriate pressure vessel design, proper labeling, and certified transport vehicles. Shipments must comply with dangerous goods transportation requirements including proper documentation, driver training, and emergency response procedures. Cylinders and bulk containers must meet relevant pressure vessel standards and inspection requirements.

Carbon dioxide is regulated under various frameworks including CLP regulation for classification and labeling, pressure equipment directives for storage vessels, and transportation regulations for ADR compliance. While not classified as SVHC under REACH, CO2 emissions may be subject to environmental regulations and greenhouse gas reporting requirements depending on application and quantity used.

Carbon dioxide is available through OYSI, a European chemical distributor offering reliable supply chains across Europe. OYSI provides various grades and packaging options to meet industrial, laboratory, and commercial requirements. As an established distributor, OYSI ensures compliance with European regulations and provides technical support for CO2 applications and handling requirements.