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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes (incl. QA statement)
Type of method:
gas saturation method
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
0.03 other: mPa
Remarks on result:
other: Because in the test solution the d-phenothrin peak area was lower than the LOD, for the test article P < 0.030 mPa.

The results of the linearity test for the response of the test article are summarized in Table 13. The data relating to three injection peak areas concerning each concentration were used to determine mean value, standard deviation (S.D.) and coefficient of variation (C.V. %). The working standard solution at 25 ng/mL was also injected to lowered the limit of detection. The representative chromatogram is reported in Figure 13.

d-PNT

Standard 1
50 µg/mL
(peak area)

Standard 2
75 µg/mL
(peak area)

Standard 3
125 µg/mL
(peak area)

1st      injection

8812

12625

22909

2"d     injection

8262

13972

21435

3R1     injection

9195

13451

19855

Mean

8756

13349

21400

CV %

3.79%

4.15%

5.83%

 

Parameter m
(slope)

Parameter q
(intercept)

Parameter R
(correlation)

167

544

0.99944

The vapour pressure tests were performed on the test article sample at 25 °C (298 K) with a 20 mUmin nitrogen flow rate. The chromatogram is reported in Figure 14.

Test at 298 K (25 °C)

115.2 L of N2 at 20 mL/min

Volume of the sample solution : 20 mL

Area sample : < 25.0 ng/mL

Area standard at 25.0 ng/mL (limit of detection) : 4437

  P (mPa) = P (mmHg) x 0.132 x 106= 0.030 mPa

Conclusions:
Because in the test solution the d-phenothrin peak area found was lower than the LOD, for the test article the vapour pressure P is < 0.030 mPa.
Executive summary:

The vapour pressure of the test material "d-phenotrin pure active substance" has been tested according to the following guidelines: OECD no. 104 and EU method A.4 following the gas saturation method.

The determination of the test article was performed by GC using the MS detector and an external standard.

Preliminary tests on the test article were carried out to avoid any chromatographic peak of impurities or degradation products interfering with the test article peak and to determine the optimum chromatographic conditions for its quantitation.

The vapour pressure tests were performed on the test article sample at 25 °C (298 K) with a 20 mL/min nitrogen flow rate.

Because in the test solution the d-phenothrin peak area was lower than the LOD, for the test article P < 0.030 mPa.

Description of key information

The vapour pressure of the test material "d-phenothrin pure active substance" has been tested according to the OECD no. 104 guideline and EU method A.4 following the gas saturation method. The vapour pressure tests were performed on the test article sample at 25 °C (298 K).

Because in the test solution the d-phenothrin peak area was lower than the LOD, the vapour pressure of the test article P was determined < 0.030 mPa.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information