CO2

CO2 is the chemical formula for carbon dioxide, a gas with many roles in food production. It provides the fizz in carbonated beverages, and in modified-atmosphere packaging it displaces oxygen to slow microbial growth and extend the shelf life of fresh meats, baked goods, and produce. Supercritical carbon dioxide serves as a solvent for decaffeinating coffee and extracting flavours and essential oils. Dry ice, its solid form, refrigerates during transport. Handling rules address asphyxiation risk in confined spaces where the odourless gas can accumulate.