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      R290
      Packing: non-recycled steel cylinder: 13.2lb/6kg,22lb/10kg,
      recycled steel cylinder: 926L
      Physical properties  
      Molecular weight 44.097
      Boiling point(℃) -42.07
      Critical temperature, °C  96.67
      Critical pressure, Mpa     4.25
      Specific heat of liquid, 30°C, [KJ/(kg°C)] 1.64
      ODP  0
      GWP 0.0011
      Quality standard  
      Purity, %   ≥99%
      Moisture ≤20
      Acidity ≤1
      Residue on evaporation ≤800
      Appearance  Odorless and clear
      Odor No odor
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