2.2.1. Definitions
2.2.1.1.
Flammable gas means a gas or gas mixture having a flammable range with air at 20 °C and a standard pressure of 101,3 kPa.
2.2.1.2.
A pyrophoric gas means a flammable gas that is liable to ignite spontaneously in air at a temperature of 54 °C or below.
2.2.1.3.
A chemically unstable gas means a flammable gas that is able to react explosively even in the absence of air or oxygen.