P5 gas mix

A non-flammable gas mixture of argon and methane that is often used as a make-up gas in electron capture detectors (ECDs)

Ar / CH4

P5 gas is used extensively in the laboratory


  • Make up gas in electron capture detectors (ECDs)
Product Summary

Gas composition

  • Argon balance
  • Methane 5% ± 0.3%


Moisture ≤ 25 ppm

Compressed gas sizes

UN number: 1956

Download safety data sheet


Size Product code Volume / m³ Weight (full)* / kg Pressure / kPa Outlet connection Availability
G 267150 10 20,000 Type 20 NZ wide
Additional Details

Physical & chemical properties

Appearance Odour Flammability
AppearanceColourless gas OdourOdourless FlammabilityNon flammable

Hazard class


Hazard symbol (GHS)

  • Non-flammable non-toxic gas 2.2