Bangladeshi Nitrous Oxide (laughing gas) Standard: * 98% v/v N2O in gaseous phase * < 300 PPM CO2 * < 10 PPM CO * < 2 PPM NO NOx * No PPM of H2O impurities only chemical test N2O best price in Dhaka Bangladesh – Oxygen Cylinder BD. Nitrous oxide is a colorless gas with a faint, sweet odor. offers clients of nitrous oxide which is widely Nitrous oxide used in surgeries and dentistry.
