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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
Data is from publication.
Qualifier:
according to guideline
Guideline:
other: As mentioned below
Principles of method if other than guideline:
The vapour pressure of 4,5-dichloro-2-nitroaniline was calculated by Knudsen effusion measurements.
GLP compliance:
not specified
Type of method:
effusion method: Knudsen cell
Specific details on test material used for the study:
Name of the test chemical: 4,5-dichloro-2-nitroaniline
Molecular formula: C6H4Cl2N2O2
Molecular weight: 207.016 g/mol
Smiles Notation: Nc1cc(Cl)c(Cl)cc1[N+]([O-])=O
InChI: 1S/C6H4Cl2N2O2/c7-3-1-5(9)6(10(11)12)2-4(3)8/h1-2H,9H2
Substance Type: Organic
Physical State: Solid Powder (Brown)
Key result
Test no.:
#1
Temp.:
78.175 °C
Vapour pressure:
0.199 Pa
Remarks on result:
other: at lowest temperature
Key result
Test no.:
#2
Temp.:
94.226 °C
Vapour pressure:
0.995 Pa
Remarks on result:
other: at highest temperature

TABLE 3

Knudsen effusion results for 4,5-dichloro-2-nitroaniline.

T/K

t/s

p/Pa

 

 

102.Δln(p/Pa)

 

 

 

 

Small

Medium

Large

Small

Medium

Large

4,5-Dichloro-2-nitroaniline

351.325 

 

22494

0.199

0.196

0.193

1.0

-0.4

-1.7

353.214

 

18181

0.251

0.243

0.239

4.6

1.4

-0.3

355.250

 

17334

 

0.288

0.286

 

-2.7

-3.5

357.236

 

15514

0.364

0.355

 

0.2

_2.2

 

359.422

 

18506

0.463

0.453

0.452

2.1

_0.2

_0.3

361.446

 

16474

0.565

0.558

0.552

1.6

0.4

_0.7

363.232

 

14987

0.665

0.673

0.675

0.2

1.4

1.6

365.490

 

14427

0.831

0.843

0.807

0.3

1.8

_2.7

367.376

 

11609

0.995

0.996

0.976

0.0

0.1

_2.0

The equilibrium vapour pressure is denoted byp, and the deviations of experimental results

from those given by the Clausius–Clapeyron equation are denoted by102. Δln(p/Pa)

 

Conclusions:
The vapour pressure of 4,5-dichloro-2-nitroaniline was determined in the range of 0.1 to 1.0 Pa at several temperature (0.199 Pa at lowest temp 78.175 °C and 0.995 Pa at highest temperature 94.226 °C)
Executive summary:

In the present study the vapour pressure of 4,5-dichloro-2-nitroaniline was determined by Knudsen effusion technique.

The vapour pressures of 4,5-dichloro-2-nitroaniline, over the range of 0.1 to 1.0 Pa, were measured, at several temperatures (0.199 Pa at lowest temp 78.175 °C and 0.995 Pa at highest temperature 94.226 °C).

Description of key information

The vapour pressure of 4,5-dichloro-2-nitroaniline was determined in the range of 0.1 to 1.0 Pa at several temperature (0.199 Pa at lowest temp 78.175 °C and 0.995 Pa at highest temperature 94.226 °C)

Key value for chemical safety assessment

Vapour pressure:
0.199 Pa
at the temperature of:
78.175 °C

Additional information

In the present study the vapour pressure of 4,5-dichloro-2-nitroaniline was determined by Knudsen effusion technique.

The vapour pressures of 4,5-dichloro-2-nitroaniline, over the range of 0.1 to 1.0 Pa, were measured, at several temperatures (0.199 Pa at lowest temp 78.175 °C and 0.995 Pa at highest temperature 94.226 °C).