1,1,1-Trifluoroethane

• R 143a
• Freon 143a

Colorless gas with a sweet odor

Gaseous

3.822 kg · m 3 (0 ° C)

-111.3 ° C

-47.2 ° C

Risk

4470 (relative to 100 years)

Template: Infobox chemical / molecular formula search available

Trifluoroethane is a gaseous organic chemical compound from the group of hydrofluorocarbons ( HFCs).

Properties

Trifluoroethane is a highly flammable gas which forms explosive mixtures with air. The explosion range is between 9.5 vol% as the lower explosive limit ( LEL) and 19 vol% as the upper explosive limit ( UEL). With a relative gas density of 2.96 (Air = 1), the gas is heavier than air and collects at the bottom. The vapor pressures at various temperatures are shown in the following table:

The vapor pressure function is given by Antoine corresponding log10 (P) = A- ( B / ( T C )) ( P in bar, T in K) with A = 4.02423, B = C = -30.093 786.645 and in the temperature range of 174 K to 226 K.

Use

C2H3F3 place as a refrigerant use.

Environment

Difluoromethane as a greenhouse gas is 4470 times more potent than CO2. However, in contrast to the chlorofluorocarbon substances it is not ozone depleting. In the Kyoto Protocol, it is named as " hydrogen-containing fluorocarbon " whose emissions must be reduced.