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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:
20 December, 2017 - 17 January, 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: vapour pressure balance
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 55503625
- Expiration date of the lot/batch: 28 April 2019
- Date received: 28 April 2017
- Purity: 100%
- Appearance: Pale yellow powder
- Storage conditions: Room temperature (15 to 25°C), dark
Key result
Temp.:
25 °C
Vapour pressure:
0.001 Pa

The results from Runs 1 and 2 are detailed in Tables 1 and 2, .  A summary is shown below:

 

Run 1

Run 2

Correlation:

-0.9969

-0.9808

Slope:

-5022

-4531

Intercept:

13.74

12.33

Log Vpat 25°C:

-3.10

-2.86

Vp(Pa) at 25°C:

7.9 × 10-4

1.4 × 10-3

The mean vapour pressure was 1 × 10-3 Pa at 25°C.

A visual assessment of the sample following testing confirmed that the test item had not undergone any changes

Table 1            Determination of the vapour pressure of DNAN (Run1)

Temperature

(°C)

Mass difference (µg)

Condensationrate (µg/s)

Vapour pressure

                 (Pa)                 

a

Corrected vapour pressure

                   (Pa)                  

1/Temperature (1/K)

Log vapour pressure

 

From

mass difference

From condensation

 

From

mass difference

From condensation

 

 

25.5

 

0.44

 

0.020

 

0.00073

 

0.00094

 

0.783

 

0.00120

 

0.00120

 

0.00335

 

-2.92

31.5

0.78

0.013

0.00128

0.00061

0.385

0.00159

0.00159

0.00328

-2.80

36.0

1.50

0.012

0.00247

0.00060

0.216

0.00277

0.00277

0.00323

-2.56

41.0

2.89

-

0.00476

-

-

0.00476

-

0.00318

-2.32

46.0

5.77

-

0.00952

-

-

0.00952

-

0.00313

-2.02

51.5

10.32

-

0.01702

-

-

0.01702

-

0.00308

-1.77

56.5

19.98

-

0.03294

-

-

0.03294

-

0.00303

-1.48

62.0

35.30

-

0.05820

-

-

0.05820

-

0.00298

-1.24

66.5

60.61

-

0.09992

-

-

0.09992

-

0.00294

-1.00

71.5

84.36

0.666

0.13908

0.03374

0.216

0.15595

0.15595

0.00290

-0.81

76.5

112.11

2.220

0.18483

0.11328

0.469

0.24148

0.24148

0.00286

-0.62

Table 2            Determination of the vapour pressure of DNAN (Run2)

Temperature

(°C)

Mass difference (µg)

Condensationrate (µg/s)

Vapour pressure

                 (Pa)                 

a

Corrected vapour pressure

                   (Pa)                  

1/Temperature (1/K)

Log vapour pressure

 

From

mass difference

From condensation

 

From

mass difference

From condensation

 

 

24.0

 

1.17

 

0.013

 

0.00192

 

0.00063

 

0.280

 

0.00223

 

0.00223

 

0.00337

 

-2.65

29.0

1.50

0.019

0.00247

0.00088

0.302

0.00291

0.00291

0.00331

-2.54

34.5

1.50

-

0.00247

-

-

0.00247

-

0.00325

-2.61

39.0

2.55

-

0.00421

-

-

0.00421

-

0.00320

-2.38

44.5

5.00

-

0.00824

-

-

0.00824

-

0.00315

-2.08

49.0

9.66

-

0.01592

-

-

0.01592

-

0.00310

-1.80

55.0

19.54

-

0.03221

-

-

0.03221

-

0.00305

-1.49

59.5

35.30

-

0.05820

-

-

0.05820

-

0.00301

-1.24

64.5

60.27

-

0.09937

-

-

0.09937

-

0.00296

-1.00

69.5

81.03

0.740

0.13359

0.03738

0.245

0.15228

0.15228

0.00292

-0.82

74.5

105.45

1.710

0.17385

0.08701

0.400

0.21736

0.21736

0.00288

-0.66

Conclusions:
The vapour pressure of DNAN was found to be 1 × 10^-3 Pa at 25°C.
Executive summary:

The purpose of this study was to determine the vapour pressure of the test item, DNAN.

The study was conducted in accordance with accepted principles in order to meet the requirements of REACH Regulation (EU) No 1907/2006 of the European Parliament and of the Council, REACH Regulation (EC) No 440/2008 (as amended) of 30 May 2008 (Method A.4) and the OECD Guidelines for Testing of Chemicals (Method104).

The vapour pressure of DNAN was found to be 1 x 10-3Pa at 25ºC.

Description of key information

The vapour pressure of DNAN was found to be 1 x 10-3 Pa at 25ºC.

Key value for chemical safety assessment

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

Additional information

Vapour pressure determination of DNAN (Envigo CRS Limited, XC41NW, 2018) was performed according to EC Method A.4 and OECD Method 104 and in compliance with GLP. The vapour pressure was determined using a vapour pressure balance.

The vapour pressure of DNAN was found to be 1 x 10-3 Pa at 25°C.