Sprayer

A sprayer, comprising:

• a container,
• a propellant composition comprising (Z)-1-chloro-2,3,3,3-tetrafluoropropene and (E)-1,3,3,3-tetrafluoropropene, wherein the (Z)-1-chloro-2,3,3,3-tetrafluoropropene is present in an amount of 20 mass % or more and less than 100 mass %, and the (E)-1,3,3,3-tetrafluoropropene is present in an amount of more than 0 mass % and less than 80 mass %, where mass % is based on the total mass of (Z)-1-chloro-2,3,3,3-tetrafluoropropene and (E)-1,3,3,3-tetrafluoropropene, and wherein the propellant composition is contained under pressure as a liquid and a gas in the interior of the container, and
• a spray unit to spray the propellant composition out of the container,
• wherein the propellant composition satisfies the following requirements (1) and (2) throughout an entire period over a first state of the sprayer and a second state of the sprayer:
• (1) a no combustibility combustion test result in a combustion test on a mixture of the propellant composition and air in a container controlled at 60° C.±3° C. under 101.3 kPa±0.7 kPa as specified in ASTM E-681-09, such that no combustibility corresponds with the combustion test result when the mixture has no combustibility in the entire range of a proportion of the propellant composition to the total volume of the mixture being higher than 0 vol % and up to 100 vol % and when, in a gaseous phase in the vicinity of the center of the container, a fire is made by discharge ignition under 15 kV at 30 mA for 0.4 second, spread of flame is visually confirmed, and when the angle of spread of the flame upward is less than 90 degrees;
• (2) the global warming potential (100 years) in accordance with Intergovernmental Panel on Climate Change (IPCC), Fifth assessment report, is less than 10;
• wherein the first state of the sprayer:
• a first liquid volume of the propellant composition in the container is at most 90 vol % of a volume of the container at a first pressure, and
• wherein the second state of the sprayer:
• a second liquid volume of the propellant composition in the container is less than the first liquid volume at a second pressure, wherein the second pressure is atmospheric pressure.