Method for producing purified difluoromethane (hfc-32), and composition containing hfc-32

A composition, comprising:

• difluoromethane (HFC-32);
• a component X;
• and
• a substance A,
• wherein a total concentration of the three components is 99.5% by mass or more relative to a total of the composition,
• the component X is at least one selected from the group consisting of pentafluoroethane (HFC-125), 1,1,1-trifluoroethane (HFC-143a), and dichlorodifluoromethane (CFC-12),
• the substance A is at least one of an amine and a fluorinated ether, and
• a content of the component X is more than 0% by mass and 0.4% by mass or less relative to the total of the composition, and a content of the substance A is more than 0% by mass and 0.1% by mass or less relative to the total of the composition.

A composition, comprising:

• difluoromethane (HFC-32);
• and
• a substance A,
• wherein a total concentration of the two components is 99.5% by mass or more relative to a total of the composition,
• the substance A is at least one of an amine and a fluorinated ether, and
• a content of the substance A is more than 0% by mass and 0.1% by mass or less relative to a total of the composition.

A composition, comprising:

• difluoromethane (HFC-32);
• and
• a component X,
• wherein a total concentration of the two components is 99.5% by mass or more relative to a total of the composition,
• the component X is at least one selected from the group consisting of pentafluoroethane (HFC-125), 1,1,1-trifluoroethane (HFC-143a), and dichlorodifluoromethane (CFC-12), and
• a content of the component X is more than 0% by mass and 0.4% by mass or less relative to a total of the composition.