Propanoic acid, 2,2,3-trifluoro-3-[1,1,2,2,3,3-hexafluoro-3-(trifluoromethoxy)propoxy]-

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2007

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study was carefully performed using standard instrumentation according to an ASTM method. However, the OECD method specifies somewhat different procedures than the ASTM method, and it was not conducted in accord with GLP guidelines.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: ASTM E1719-97 (Vapor Pressure Measurement by Ebulliometry) and ASTM D1120-94 (Standard Test Method for Boiling Point of Engine Coolants)

Deviations:

not specified

GLP compliance:

no

Type of method:

dynamic method

Test material

Test material information

Constituent 1

Reference substance name:

DONA

IUPAC Name:

DONA

Details on test material:

- Name of test material (as cited in study report): PF-13 Acid
- Lot/batch no.: 144560-059-5

Results and discussion

Vapour pressure

Temp.:

20 °C

Vapour pressure:

32 Pa

Any other information on results incl. tables

The temperatures measured were that of the pot temperature, rather than distillate, as per ASTM E1719-97 (Vapor Pressure Measurement by Ebulliometry). Figure 1. (Vapor Pressure 1) --> SEE ATTACHMENT 1

The data are fit by the Antoine equation:

ln(Pvap) = A / (T + C) + B

Figure 2. (Vapor Pressure 2) (ln(Pvap) vs 1/(T+C)) --> SEE ATTACHMENT 2

Pvap (mm Hg) = exp(-6619.26267/(T °C + 273.15) + 21.134863) R² = 0.994989

The vapor pressure obtained from this equation is 32 Pa (0.0046 psia) at 20 °C (68 °F).

Applicant's summary and conclusion

Conclusions:

The extrapolated vapor pressure of DONA was determined to be 32 Pa at 20 °C

Executive summary:

The vapor pressure of DONA was extrapolated from the measured vapor pressures and temperatures for the compound. Measurements were made according to method ASTM E1719-97. Vapor pressure and temperature were measured at a variety of equilibrium points covering a temperature range of ca. 60 °C to ca. 180 °C and fit to the Antoine equation ln(VP) = A/(T+C)+B, where T is the pot temperature in °C. The linear regression equation was VP = exp(-6619.26267/(T °C + 273.15) + 21.134863). The R2 = 0.994989. The extrapolated vapor pressure of DONA at 20 °C (68 °F) was determined to be 32 Pa (0.0046 psia). The study was conducted under method ASTM E1719-97 (Vapor Pressure of Liquids by Ebulliometry). The dynamic method is approved for this endpoint per OECD TG 104§8, however the OECD method specifies somewhat different procedures than the ASTM method. The study was not conducted in accord with GLP guidelines. Therefore, the study is classified as acceptable with restrictions.