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Isobutane, i-C4H10 is a colourless, flammable, liquified gas with a slight odour.

Pure isobutane is used:

  • as a propellant
  • as a solvent
  • as a refrigerant
  • as reagent gas in chemical ionization mass spectrometry
  • in the manufacturing of calibration mixtures.

Materials Compatibility
Metals: Brass; Stainless Steel; Carbon Steel; Aluminum; Zinc; Copper; Monel.
Plastics: Kel-F; PTFE; PVC; PP; Polyurethane; Polyamides.
Elastomers: Buna-N; Neoprene; Viton.

Technical Properties
Molecular Weight: 58.13
Specific Gravity (Air = 1): 2.06
Odour: Slight
CAS Registry No.: 75-28-5