HP Gas

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 arom

* 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
High-Purity Nitrous Oxide (Nitrous Oxide)


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

High-Purity Nitrous Oxide (Nitrous Oxide)