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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
dynamic method
Specific details on test material used for the study:
- Name of test material (as cited in study report): Novares TL 10; CAS-no. 71302-83-5 (Hydrocarbons, C9- unsaturated, polymerized)
- Composition of test material, percentage of components: see Section 1.2 Composition
- Lot/batch No.: 28724
- Stability under test conditions: no measured data; based on chemical structure assumed to be stable
- Storage condition of test material: room temperature, exclusion of light
Key result
Temp.:
20 °C
Vapour pressure:
0.007 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
25 °C
Vapour pressure:
0.011 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
30 °C
Vapour pressure:
0.019 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot

Pressure values and corresponding temperatures

 

Temperature [°C]

148

174

187

204

232

254

Vapour pressure [hPa]

1

5

10

20

50

100

 

 Linear regression equation:        log p = -4,122.1896 (1/T) + 11.8806

Conclusions:
The vapour pressure of Novares TL 10 is determined to be very low, approx. 0.01 to 0.02 Pa at ambient temperatures.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
dynamic method
Specific details on test material used for the study:
- Name of test material (as cited in study report): Novares L 100; CAS-no. 71302-83-5 (Hydrocarbons, C9- unsaturated, polymerized)
- Composition of test material, percentage of components: see Section 1.2 Composition
- Stability under test conditions: no measured data; based on chemical structure assumed to be stable
- Storage condition of test material: room temperature, exclusion of light
Key result
Temp.:
20 °C
Vapour pressure:
0.021 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
25 °C
Vapour pressure:
0.035 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
30 °C
Vapour pressure:
0.059 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot

Pressure values and corresponding temperatures

 

Temperature [°C]

131

158

167

184

210

232

Vapour pressure [hPa]

1

5

10

20

50

100

 

Linear regression equation: log p = -4,018.2625 (1/T) + 12.0253

Conclusions:
The vapour pressure of Novares L 100 is estimated to be very low, approx. 0.02 - 0.06 Pa at ambient temperatures.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
dynamic method
Specific details on test material used for the study:
- Name of test material (as cited in study report): Novares L 800; CAS-no. 71302-83-5 (Hydrocarbons, C9- unsaturated, polymerized)
- Composition of test material, percentage of components: see Section 1.2 Composition
- Stability under test conditions: no measured data; based on chemical structure assumed to be stable
- Storage condition of test material: room temperature, exclusion of light
Key result
Temp.:
20 °C
Vapour pressure:
0.006 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
25 °C
Vapour pressure:
0.011 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
30 °C
Vapour pressure:
0.018 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot

Pressure values and corresponding temperatures

 

Temperature [°C]

150

183

197

215

242

262

Vapour pressure [hPa]

1

5

10

20

50

100

 

 Linear regression equation:        log p = -4,028.7955 (1/T) + 11.5372

Conclusions:
The vapour pressure of Novares L 800 is estimated to be very low, approx. 0.01 to 0.02 Pa at ambient temperatures.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
dynamic method
Specific details on test material used for the study:
- Name of test material (as cited in study report): Novares C 10; CAS-no. 71302-83-5 (Hydrocarbons, C9- unsaturated, polymerized)
- Composition of test material, percentage of components: see Section 1.2 Composition
- Stability under test conditions: no measured data; based on chemical structure assumed to be stable
- Storage condition of test material: room temperature, exclusion of light
Key result
Temp.:
20 °C
Vapour pressure:
0.03 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
25 °C
Vapour pressure:
0.05 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot
Key result
Temp.:
30 °C
Vapour pressure:
0.081 Pa
Remarks on result:
other: calculated from linear regression of log p over 1/T plot

Pressure values and corresponding temperatures

 

Temperature [°C]

121

153

171

188

216

239

Vapour pressure [hPa]

0.5

5

10

20

50

100

 

Linear regression equation:        log p = -3,842.4279 (1/T) + 11.5841

Conclusions:
The vapour pressure of Novares C 10 is estimated to be very low, approx. 0.03 - 0.08 Pa at ambient temperatures.

Description of key information

The vapour pressure of the substance ‘Naphtha (petroleum), steam-cracked, C8-10 aromatic hydrocarbon fraction, alkylated and oligomerised’ (NAF-AO) (see Chapter 1) was determined for four different specifications of the substance. At 20 and 25 °C, vapour pressures ranged from 0.007 to 0.03 Pa and from 0.01 to 0.05 Pa, respectively.

Key value for chemical safety assessment

Vapour pressure:
0.03 Pa
at the temperature of:
20 °C

Additional information

Four reliable studies (according to OECD TG 104) were conducted to determine the vapour pressure of various specifications of NAF-AO. Corresponding pairs of vapour pressure and temperature between 1 and 100 hPa (corresponding temperature between 120 and 250 °C / 393.15 and 523.15 K) were determined. The vapour pressures at a given temperature were obtained by linear regression of the vapour pressure/temperature curves (plots of log p vs. 1/T). At 20 and 25 °C, the maximum vapour pressures were estimated to be not higher than 0.03 and 0.05 Pa, respectively.