nitrous oxide nitrous oxide nitrous oxide names iupac names nitrous oxide (not recommended)dinitrogen oxide (alternative name) systematic iupac name oxodiazen-2-ium-1-ide other names laughing gas, sweet air, nitrous, nos, protoxide of nitrogen, hyponitrous oxide, dinitrogen oxide, dinitrogen monoxide identifiers cas number 10024-97-2 y 3d model (jsmol) interactive imageinteractive image beilstein reference 8137358 chebi chebi:17045 y chembl chembl1234579 n chemspider 923 y drugbank db06690 n echa infocard 100.030.017 e number e942 (glazing agents, ...) gmelin reference 2153410 kegg d00102 y pubchem cid 948 rtecs number qx1350000 unii k50xqu1029 y un number 1070 (compressed)2201 (liquid) comptox dashboard (epa) dtxsid8021066 inchi inchi=1s/n2o/c1-2-3 ykey: gqplmrytrlflpf-uhfffaoysa-n yinchi=1/n2o/c1-2-3inchi=1/n2o/c1-2-3key: gqplmrytrlflpf-uhfffaoyap smiles n#==o properties chemical formula n2o molar mass 44.013 g/mol appearance colourless gas density 1.977 g/l (gas) melting point −90.86 °c (−131.55 °f; 182.29 k) boiling point −88.48 °c (−127.26 °f; 184.67 k) solubility in water 1.5 g/l (15 °c) solubility soluble in alcohol, ether, sulfuric acid log p 0.35 vapor pressure 5150 kpa (20 °c) magnetic susceptibility (χ) −18.9·10−6 cm3/mol refractive index (nd) 1.000516 (0 °c, 101.325 kpa) viscosity 14.90 μpa·s structure molecular shape linear, c∞v dipole moment 0.166 d thermochemistry std molarentropy (s⦵298) 219.96 j/(k·mol) std enthalpy offormation (δfh⦵298) +82.05 kj/mol pharmacology atc code n01ax13 (who) routes ofadministration inhalation pharmacokinetics: metabolism 0.004% biological half-life 5 minutes excretion respiratory hazards ghs labelling: pictograms signal word danger hazard statements h270, h280, h281 precautionary statements p220, p244, p282, p336+p317 nfpa 704 (fire diamond) 2 0 0ox flash point nonflammable safety data sheet (sds) ilo.org, icsc 0067 related compounds related nitrogen oxides nitric oxidedinitrogen trioxidenitrogen dioxidedinitrogen tetroxidedinitrogen pentoxide related compounds ammonium nitrateazide except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references