1-Octadecanaminium,N,N-Dimethyl-N-Octadecyl-,(Sp-4-2)-[29h,31h-Phthalocyanine2-Sulfonato(3-)-N 29,N 30,N 31,N 32]Cuprate(1-)

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February 14 - February 21, 1989

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The study was performed according to guideline under GLP conditions. The restriction due to the fact that measurements were performed at the low range of the sensing head and the vapour pressure was determined by extrapolation.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1989

Report date:

1989

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

yes

Type of method:

static method

Test material

Test material information

Constituent 1

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

0.03 Pa

Remarks on result:

other: Vapour pressure was determined by extrapolation from a curve of ln(p) vs. recipricol of the temperature

Any other information on results incl. tables

Because the vapour pressure of the test material was < 0.1 Pa, a correction according to Bennett and Tompkins (Trans Faraday Soc. 1957, 53, 185) for thermal transpiration was performed. The test substance showed no ideal behaviour, therefore, the vapour pressure curve could not be derived according to Clarke and Glew (Trans. Faraday Soc., 1966, 62, 539).

The vapour pressure at 25 ^oC was extrapolated from a plot of ln(p) vs. reciprocal of the temperature (K).

Data from the measurements are shown in Table 1:

Table 1: Determination of the vapour pressure at 3 temperatures (Static)

Measurement	Mean Temp C	ln (Pa)	Vapour pressure ( Pa)
96-107	36.96	-2.718	0.066
108-112	42.52	-2.458	0.086
114-124	50.20	-1.917	0.147

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the test material determined according to EU Method A.4 is 3.0 x 3.0 x 10-2 Pa at 25 C.

Executive summary:

The vapour pressure of the test material was determined according to EU Method A.4. A vapour pressure of 3.0 x 10^-2 Pa at 25 ^oC was determined by extrapolation of data from a plot of ln(p) vs. the reciprocal of the temperature (K).