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Physical & Chemical properties

Auto flammability

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Endpoint:
auto-ignition temperature (liquids)
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The hypothesis is based on structural similarity (prop-2-enyl substituent for the source substance instead of prop-1-enyl for the target, i.e. double bond place change) and on compared flash points.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
Refer to the Test material section of the source and target records.

3. ANALOGUE APPROACH JUSTIFICATION
Both substances are not expected to have significantly different AIT, and the read-across is considered suitable.

4. DATA MATRIX
Source 2-Methoxy-4-prop-2-en-1-ylphenol FP = 124°C
Target (E)-2-Methoxy-4-prop-1-en-1-ylphenol FP = 133°C

See Iuclid section 13 for details.
Reason / purpose:
read-across source
Reason / purpose:
read-across: supporting information
Reason / purpose:
read-across: supporting information
Auto-ignition temperature:
ca. 380 °C
Atm. press.:
98 508 - 99 608 Pa
Conclusions:
(from analogue) The auto-ignition temperature of the target substance is expected to be ca 380°C.
This parameter/method is not relevant for classification, however the information is useful regarding potential additional fire hazard.
No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The auto-ignition temperature of the test substance was measured under GLP according to DIN 51794 standard (listed in EU A.15 guideline).

Test substance was injected into a heated flask, in three independent determinations, and the lowest flask temperature at which ignition occurred was taken as the auto-ignition temperature.

The auto-ignition temperature of the test substance has been determined to be 380°C. Read-across is justified as the target substance is structurally similar (double bond place change), and with a similar flash point.

Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
29 January - 05 February, 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. No deviation was reported. Test substance is adequately specified with purity. Therefore full validation applies.
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
Qualifier:
according to
Guideline:
other: DIN 51794
Version / remarks:
2003
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. certificate)
Remarks:
inspected on 29 and 30 November, 2010 / signed on 11 April, 2011
Specific details on test material used for the study:
The test item was stored in a closed vessel dark and dry at room temperature.
Auto-ignition temperature:
380 °C
Atm. press.:
98 508 - 99 608 Pa

Pre-Determination: 408°C (99473 Pa)

 Experiment  Value  Ignition delay  Drops used  Atmospheric pressure
 First Test Series  389°C  28 s  5  99427 - 99350 Pa
 Second Test Series  385°C  18 s  4  99608 - 99171 Pa
 Third Test Series  383°C  17 s  4  99369 - 98508 Pa

The lowest value of the auto ignition temperature is 383 °C. This value was determined using 17 drops test item. The test item showed auto ignition after 17 seconds.

The auto ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C.

Therefore, the auto ignition temperature is stated as 380 °C.

Conclusions:
This parameter/method is not relevant for classification, however the information is useful regarding potential additional fire hazard.
No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The auto-ignition temperature of the test substance was measured under GLP according to DIN 51794 standard (listed in EU A.15 guideline).

Test substance was injected into a heated flask, in three independent determinations, and the lowest flask temperature at which ignition occurred was taken as the auto-ignition temperature.

The auto-ignition temperature of the test substance has been determined to be 380 °C.

Description of key information

(from analogue) AIT expected ca 380°C 

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
380 °C

Additional information

No data is available on the substance itself. However, a reliable experimental study, conducted according to a recognized EC/DIN method and under GLP, is available on an analogue.

Based on chemical similarity, and compared flash points, no significant difference is anticipated with the present dossier substance, so the read-across is considered justified for a key study.

This parameter is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard.

No particular hazard is anticipated in normal conditions of storage.