d031b852_ध_रस_यन___क__स_च____व_क_प_ड_य___Source_and_description
[Chemical name] nitrous oxide [Chemical formula] N2O [Common or alternative name] whipping gas, laughing gas [Source and description] 
Whipped cream canisters from the grocery store. Or in larger canisters from commercial restaurant supply houses. When packaged for automotive use it is usually contaminated with hydrogen sulfide to discourage inhalation.
सरलता से उपलब्ध रसायनों की सूची - विकिपीडिया