1,1-Difluoroethane

  • R152a
  • Freon 152a
  • Ethylidenfluorid
  • Ethylidendifluorid

Colorless gas with a slightly sweet odor

Gaseous

  • 0.90 g · cm -3 (liquid)
  • 1.01 g · cm -3 (liquid at boiling point )
  • 3.04 kg · m -3 ( gaseous at 0 ° C and 1013 hPa)

-117 ° C

-24.9 ° C

601 kPa ( 20 ° C)

Poorly in water ( 3.2 g · l-1 at 25 ° C)

1.3011 ( -72 ° C)

Attention

  • > 1500 mg · kg -1 ( LD50, rat, oral)
  • 977 g · m-3 · 2 h -1 ( LC50, mouse, inh. )

-497.0 KJ / mol

Template: Infobox chemical / molecular formula search available

1,1-difluoroethane is a chemical compound selected from the group of the fluorocarbons. Under the name of R152a material is mainly used as the refrigerant. The compound is highly polar with a dipole moment of 2.27 D, which causes a water solubility of 3.2 g / l at 25 ° C.

Production and representation

1,1-difluoroethane can be produced by a mercury -catalyzed addition of hydrogen fluoride to ethyne:

Safety

In animal experiments, the gas was toxic in rats and mice only at extremely high doses. It had a narcotic in rats produced drowsiness and generally subdued behavior.

CAS registry number PubChem Vapor pressure Dangerous Substances Directive (67/548/EEC) Electric dipole moment Debye CRC Handbook of Chemistry and Physics Digital Object Identifier
9931
de