Profile: Salman Brothers is engaged in the production of CO2 gas. We also offer dry ice. Our carbon dioxide (CO2) is a colorless, odorless gas that occurs naturally in our environment and subsequently transported by the blood to lungs. Our dry ice is frozen carbon dioxide, or CO2, which is a gas under standard temperature and pressure conditions and CO2 is a greenhouse gas, which means it absorbs light at infrared wavelengths.