nitrous oxide

High-Purity Nitrous Oxide (Nitrous Oxide)

Properties and Classification

Appearance: Colorless gas or liquid UN Number:
1070 (compressed gas)
2201 (liquefied gas)
CAS Number: 10024-97-2 Odor: Sweet aroma

* Refer to MSDS for detailed information on the properties and safety of the product.


Purity vol% Min. 99.999
O2 volppm Max. 2.0
N2 volppm Max. 3.0
CH4 volppm Max. 1.0
CO volppm Max. 1.0
CO2 volppm Max. 0.1
H2O volppm Max. 2.0


Item 10L cylinder 47L cylinder
Size Inside diameter 140mm 232mm
Height (to the neck portion) 850mm 1195mm
Height (with a protective cap) * 1000mm 1340mm
Valve nozzle height (center) * 885mm 1230mm
Loading weight 7.5kg 30kg
Material Manganese steel (Clean-S-treated)

* Estimated values for when a standard valve is mounted on a standard cylinder. The accuracy of these values is not guaranteed.


Nozzle size Ø22 mm X 14 right-hand threads
Material BRASS

Physical & Chemical Properties

Item Unit Data
Chemical formula   N2O
Molecular weight   44.01
Boiling point °C -88.48
°F -127.2
Melting point (87.8kPa) °C -90.85
Liquid density (Boiling point) kg/L 1.226
Gas density (0°C, 101.3kPa) g/L 1.977
Specific gravity (air: 1) (0°C, 101.3kPa)   1.977
Critical temperature °C 36.41
Critical pressure MPa 7.24
Flammability Not applicable
Toxicity   Not applicable
Latent heat of vaporization (0°C, 1013MPa) kJ/kg 376.1
Maximum permissible concentration (ACGIH, TLV-TWA) ppm 50
Explosive limit (in air, 35°C, 101.3 kPa)   -

Temperature - Vapor Pressure Curve