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EC number: 202-858-3 | CAS number: 100-50-5
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- auto-ignition temperature (liquids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- DIN EN 14522, Method P (Determination of the auto ignition temperature of gases and vapours)
- Version / remarks:
- It is not specified if method "P" or method "S" was employed.
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
- Deviations:
- no
- GLP compliance:
- no
- Specific details on test material used for the study:
- LOT: 21060301
Purity: 99.63% - Auto-ignition temperature:
- 247 °C
- Atm. press.:
- 1 001.8 hPa
- Remarks on result:
- preliminary test
- Remarks:
- 5 drops were added into the Erlenmeyer flask at each temperature.
- Auto-ignition temperature:
- 226 °C
- Atm. press.:
- >= 1 001.8 - <= 1 003.4 hPa
- Remarks on result:
- other: DIN EN 14522: The auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 226 °C.
- Key result
- Auto-ignition temperature:
- 225 °C
- Atm. press.:
- >= 1 001.8 - <= 1 003.4 hPa
- Remarks on result:
- other: Regulation (EC) No 440/2008 method A.15. and DIN 51794: The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 225 °C.
- Conclusions:
- The test item 1,2,3,6-Tetrahydrobenzaldehyde has an auto-ignition temperature of 225 °C.
- Executive summary:
The test item 1,2,3,6-Tetrahydrobenzaldehyde has an auto-ignition temperature of 225 °C according to Regulation (EC) No 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Testing of mineral oil hydrocarbons – Determination of Ignition Temperature.
It is noted here that according to ECHA guidance – Guidance on information requirements and chemical safety assessment; chapter R.7A: Endpoint specific guidance, July 2017 – the auto-ignition temperature for liquids is not used directly for classification and labeling according to Regulation (EC) No 1272/2008. However, it can be used in the chemical safety assessment in considering risks associated with processing the substance.
According to DIN EN 13463-1 the test item has to be assigned to temperature class T3 (maximum surface temperature / minimum auto ignition temperature: 200 °C).
Reference
Table 1: Results of the preliminary test
| Preliminary test | |||
| Temperature / °C | 223 | 244 | 247 |
| Ignition / +/- | - | - | + |
| Atmospheric pressure: 1001.8 hPa | |||
In the preliminary test, an ignition was observed at 247 °C.
Table 2: Results of the main test
| Main test series | Lowest temperatures of an ignition | Highest temperatures of an igntition | Atmospheric pressure |
| 1 (ZT2) | 230 | 228 | 1001.8 |
| 2 (ZT2) | 229 | 228 | 1001.8 |
| 3 (ZT3) | 231 | 229 | 1002.7 - 1003.4 |
Based on results of the main test series, the lowest auto-ignition temperature was 229 °C.
According to DIN EN 13463-1 the test item has to be assigned to temperature class T3 (see the following Table 3).
Table 3: Temperature classes
| Temperature class | Maximum surface temperature / minimum auto ignition temperature [°C] |
| T1 | 450 |
| T2 | 300 |
| T3 | 200 |
| T4 | 135 |
| T5 | 100 |
| T6 | 85 |
Description of key information
The test item 1,2,3,6-Tetrahydrobenzaldehyde has an auto-ignition temperature of 225 °C according to Regulation (EC) No 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Testing of mineral oil hydrocarbons – Determination of Ignition Temperature.
It is noted here that according to ECHA guidance – Guidance on information requirements and chemical safety assessment; chapter R.7A: Endpoint specific guidance, July 2017 – the auto-ignition temperature for liquids is not used directly for classification and labeling according to Regulation (EC) No 1272/2008. However, it can be used in the chemical safety assessment in considering risks associated with processing the substance.
According to DIN EN 13463-1 the test item has to be assigned to temperature class T3 (maximum surface temperature / minimum auto ignition temperature: 200 °C).
Key value for chemical safety assessment
- Autoflammability / Self-ignition temperature at 101 325 Pa:
- 225 °C
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