Nitrous Oxide (N2O) is a colorless, oxidizing, liquified gas with a slightly sweetish taste and odor.

Used in optical spectrometry as an instrumentation gas; Used in atomic absorption for elemental analysis as an instrumentation gas; Component in industrial hygiene gas mixtures. Used as the oxidizing agent of combustion gases for atomic absorption spectrometry. Used in medical applications, and in certain food processing applications. In semiconductor fabrication: Oxygen source for Chemical Vapor Deposition (CVD) of silicon dioxide, SiO2. 

Item	Pure N2O	High purity N2O
N2O	>=99.99%	>=99.999%
nitrogen	<=10 ppm	<=5 ppm
Oxygen and Argon	<=2 ppm	<=1 ppm
Total Hydrocarbons (as CH4)	<=1 ppm	<=1 ppm
Carbon Monoxide	<=1 ppm	<=1 ppm
Carbon Dioxide	<=2 ppm	<=1 ppm
Moisture	<=3 ppm	<=1 ppm
Ammonia	<=1 ppm	<=0.5 ppm
Nitric Oxide	<=1 ppm	<=0.5 ppm
Nitrogen Dioxide	<=1 ppm	<=0.5 ppm

laughing gas(nitrous oxide or N2O)