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Physical & Chemical properties

Auto flammability

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Description of key information

310°C

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
310 °C

Additional information

The autoignition temperature was determined in two experimental studies. The EC A.15 guideline compliant, GLP conform, key study was conducted with B-TEGME (90.7% pure). The second study was conducted with B-TEGME at unknown purity, according to GLP and guideline DIN EN 14522 (Verfahren S).

The key-study was carried out in accordance with EC Test A.15, using IEC 79-4, “Method of Test for Ignition Temperature”. Though the guideline requires 2°C increments, the study used temperature increments of 5°C temperature. This deviation to the guideline is considered to have no major effect on the result. The test was carried out at different temperatures, using a various test item quantity, in order to establish the lowest temperature at which auto-ignition occurs for any test item quantity. The tests to establish the ignition/no ignition temperatures were made at 5°C increments, using maximum observation periods of 5 minutes. The room temperature ranged from 20 to 22°C and the atmospheric pressure ranged from 740 to 767 mmHg. Under these conditions, the auto-ignition temperature of B-TEGME was 310±5°C.

The supporting non-GLP study was determined according to DIN 14522 (Verfahren S) up to a temperature of 232°C. The report does not provide further experimental details . Since the test substance purity is not stated, the auto-ignition temperature may have been affected by impurities. Therefore, and due to the limited information on applied methodologies and the small numbers of tests, this study was considered supportive and of only minor relevance for the risk assessment of B-TEGME.

Based on the information provided in the key study, the auto-ignition temperature is of B-TEGME is 310±5°C.