Pentafluoroethane

Henry's Law constant

Administrative data

Endpoint:

Henry's law constant

Type of information:

calculation (if not (Q)SAR)

Remarks:

Migrated phrase: estimated by calculation

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Peer-reviewed study reported with a sufficient level of details.

Data source

Reference

Title:

Solvation properties of refrigerants and the estimation of their water-solvent and gas-solvent partitions.

Author:

Abraham, M.H., Gola, J.M.R., Cometto-Muniz, J.R., Cain, W.S.

Year:

2001

Bibliographic source:

Fluid Phase Equilibria 180, 41-58

Materials and methods

Test material

Test material information

Constituent 1

Reference substance name:

Pentafluoroethane

EC Number:

206-557-8

EC Name:

Pentafluoroethane

Cas Number:

354-33-6

Molecular formula:

C2HF5

IUPAC Name:

1,1,1,2,2-pentafluoroethane

Results and discussion

Henry's Law constant H

H:

ca. 28 180 Pa m³/mol

Temp.:

25 °C

Any other information on results incl. tables

The HLC constant may be calculated from the equation below:

Ls = R x T x d/(HLC x MW)

Where Ls is the Ostwald coefficient for HFC-125 in water (Log Ls=-1.059), R is the universal gas constant (8.31 J K^-1mol^-1), T is the temperature (298.15 K), d and MW are the water density (1 x 10⁶ g/m³) and Molecular weight (18 uma), respectively.
HLC (per unit mole fraction) = 1,559 MPa which can be converted to HLC [Pa m³/mol] by dividing for the conversion factor 55323, thus:
HLC = 28,180 Pa m³/mol