for those who are wondering...

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N2O ; Nitrous oxide
CAS Number : 10024-97-2
UN1070 (gas); UN2201 (liquid refrigerated)

Nitrogen oxide; Dinitrogen monoxide; Dinitrogen oxide; Laughing gas; nitrogen monoxide

SUPPLY MODE:
This product can be supplied in cylinders, or liquefied gas tank.

Molecular Weight
Molecular weight : 44.013 g/mol

Solid phase
Melting point : -91 C
Latent heat of fusion (1,013 bar, at triple point) : 148.53 kJ/kg

Liquid phase
Liquid density (1.013 bar at boiling point) : 1222.8 kg/m3
Liquid/gas equivalent (1.013 bar and 15 C (59 F)) : 662 vol/vol
Boiling point (1.013 bar) : -88.5 C
Latent heat of vaporization (1.013 bar at boiling point) : 376.14 kJ/kg
Vapor pressure (at 20 C or 68 F) : 58.5 bar

Critical point
Critical temperature : 36.4 C
Critical pressure : 72.45 bar

Gaseous phase
Gas density (1.013 bar at boiling point) : 3.16 kg/m3
Gas density (1.013 bar and 15 C (59 F)) : 1.872 kg/m3
Compressibility Factor (Z) (1.013 bar and 15 C (59 F)) : 0.9939
Specific gravity (air = 1) (1.013 bar and 21 C (70 F)) : 1.53
Specific volume (1.013 bar and 21 C (70 F)) : 0.543 m3/kg
Heat capacity at constant pressure (Cp) (1.013 bar and 15 C (59 F)) : 0.038 kJ/(mol.K)
Heat capacity at constant volume (Cv) (1.013 bar and 15 C (59 F)) : 0.029 kJ/(mol.K)
Ratio of specific heats (Gamma:Cp/Cv) (1.013 bar and 15 C (59 F)) : 1.302256
Viscosity (1.013 bar and 0 C (32 F)) : 0.000136 Poise
Thermal conductivity (1.013 bar and 0 C (32 F)) : 14.57 mW/(m.K)

Miscellaneous
Solubility in water (1.013 bar and 5 C (41 F)) : 1.14 vol/vol

Hazards:
Major hazard : Supports Combustion and Suffocation
Toxicity (Am. Conf. Of Gov. Ind. Hygienists ACGIH 2000 Edition) : 50 ppm
Flammability limits in air (STP conditions) : Strong Oxidiser
Odour : Sweet
UN Number : UN1070 (gas); UN2201 (liquid refrigerated)
EINECS Number : 233-032-0
DOT Label (USA) : NFG
DOT Hazard class (USA) : Non flammable Gas

Material Compatibility:
General Behavior : Equipment must be thoroughly degreased before use.
Risk of violent reaction particularly with the valves.

Aluminium Satisfactory
Brass Satisfactory but corrosive in presence of moisture.
Copper Satisfactory but corrosive in presence of moisture.
Ferritic Steels (e.g. Carbon steels) Satisfactory but corrosive in presence of moisture.
Stainless Steel Satisfactory

Plastics

Polytetrafluoroethylene (PTFE) Satisfactory
Polychlorotrifluoroethylene (PCTFE) Satisfactory
Vinylidene polyfluoride (PVDF) (KYNAR) Acceptable but possible ignition under certain conditions
Polyamide (PA) (NYLON) Acceptable but possible ignition under certain conditions and important swelling.
Polypropylne (PP) Acceptable but possible ignition under certain conditions

Elastomers

Buthyl (isobutene - isoprene) rubber (IIR) Non recommended, possible ignition and significant swelling.
Nitrile rubber (NBR) Non recommended, possible ignition and significant swelling.
Chloroprene (CR) Non recommended, possible ignition and significant swelling.
Chlorofluorocarbons (FKM) (VITON) Non recommended, significant swelling.
Silicon (Q) Satisfactory
Ethylene - Propylene (EPDM) Non recommended, possible ignition and significant swelling.

Lubricants

Hydrocarbon based lubricant Non recommended, possible ignition.
Fluorocarbon based lubricant Satisfactory