Registration Dossier
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EC number: 215-662-8 | CAS number: 1338-24-5
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2010-06-07 to 2010-06-22
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM D86
- GLP compliance:
- not specified
- Type of method:
- distillation method
- Specific details on test material used for the study:
- Name of test material (as cited in study report): NA 140
- Boiling pt.:
- 269.5 - 338.9 °C
- Atm. press.:
- 101.3 kPa
- Conclusions:
- The boiling range of naphthenic acid was concluded to be 269.5 to 338.9 °C
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2010-07-01 to 2010-08-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study performed according to ASTM guideline.
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM D86
- GLP compliance:
- not specified
- Type of method:
- distillation method
- Specific details on test material used for the study:
- - Name of test material: DNA 170
- Boiling pt.:
- 165.7 - 335.7 °C
- Atm. press.:
- 101.3 kPa
- Conclusions:
- The boiling range of naphthenic acid was concluded to be 165.7 to 335.7 °C
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2010-07-01 to 2010-08-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study performed according to ASTM guideline.
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM D86
- GLP compliance:
- not specified
- Type of method:
- distillation method
- Specific details on test material used for the study:
- Name of test material: DNA 200
- Boiling pt.:
- 162.7 - 328.8 °C
- Atm. press.:
- 101.3 kPa
- Conclusions:
- The boiling range of naphthenic acid was concluded to be 162.7 to 328.8 °C
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2010-07-01 to 2010-08-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Remarks:
- ASTM guideline
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM D86
- GLP compliance:
- not specified
- Type of method:
- distillation method
- Boiling pt.:
- 218.3 - 347.1 °C
- Atm. press.:
- 101.3 kPa
- Conclusions:
- The boiling range of naphthenic acid was concluded to be 218.3 to 347.1 °C
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 2010-07-01 to 2010-08-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study performed according to ASTM guideline.
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM D86
- GLP compliance:
- not specified
- Type of method:
- distillation method
- Specific details on test material used for the study:
- - Name of test material: CNA 190/280
- Boiling pt.:
- 106.4 - 333.6 °C
- Atm. press.:
- 101.3 kPa
- Conclusions:
- The boiling range of naphthenic acid was concluded to be 106.4 to 333.6 °C
Referenceopen allclose all
Detailed information on the boiling trajectory of naphthenic acids is presented in the table below
| % recovered | Result (°C) |
| Initial boiling point | 269.5 |
| 5 | 293.5 |
| 10 | 301.3 |
| 20 | 310.1 |
| 30 | 318.2 |
| 40 | 326.1 |
| 50 | 331.0 |
| 60 | 335.0 |
70 |
335.9 |
Detailed information on the boiling trajectory of naphthenic acids is presented in the table below
| % recovered | Result (°C) |
| Initial boiling point | 165.7 |
| 5 | 225.2 |
| 10 | 272.6 |
| 20 | 289.3 |
| 30 | 304.7 |
| 40 | 315.3 |
| 50 | 323.1 |
| 60 | 330.3 |
70 |
335.7 |
Detailed information on the boiling trajectory of naphthenic acids is presented in the table below
| % recovered | Result (°C) |
| Initial boiling point | 162.7 |
| 5 | 251.2 |
| 10 | 266.6 |
| 20 | 278.4 |
| 30 | 288.3 |
| 40 | 297.7 |
| 50 | 304.8 |
| 60 | 312.1 |
70 |
320.3 |
| 80 | 328.8 |
Detailed information on the boiling trajectory of naphthenic acids is presented in the table below
| % recovered | Result (°C) |
| Initial boiling point | 218.3 |
| 5 | 243.4 |
| 10 | 266.3 |
| 20 | 283.6 |
| 30 | 305.8 |
| 40 | 319.0 |
| 50 | 330.5 |
| 60 | 340.2 |
70 |
347.1 |
Detailed information on the boiling trajectory of naphthenic acids is presented in the table below
| % recovered | Result (°C) |
| Initial boiling point | 106.4 |
| 5 | 235.8 |
| 10 | 243.6 |
| 20 | 252.4 |
| 30 | 259.0 |
| 40 | 265.2 |
| 50 | 271.5 |
| 60 | 283.7 |
70 |
295.8 |
| 80 | 318.1 |
| 90 | 333.6 |
Description of key information
The boiling range of naphthenic acid was determined using five experimental studies considered reliable without restrictions (K1) following the ASTM D86 method (Van Ryckeghem M, 2010) in a weight of evidence approach. Following ranges were reported for each study respectively: 269.5 to 338.9°C, 165.7 to 335.7 °C, 162.7 to 328.8 °C, 218.3 to 347.1 and 106.4 to 333.6 °C.
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 254.9 °C
Additional information
Because naphthenic acid is a mixture of many different isomers of cycloalkyl carboxylic acids, physicochemical properties vary according to the proportions of the individual compounds in their composition. Therefore it is not possible to set a specific boiling point and boiling point ranges are used. These can vary depending on the composition of the naphthenic acids as reflected by the generated data. As a worst case the broadest possible range was used.
In one study an initial boiling point of 106.4 °C was reported, which was below all expectations. It was assumed that this was due to the contamination of the sample with water residues. Therefore this value was not taken into consideration for determining the boiling range.
Value used for CSA: 162.7 to 347.1 °C at 101 325 Pa
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