Absolute of Cistus ladaniferus (Cistaceae) obtained from cistus concrete by ethanol extraction

Auto flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

07 November - 12 December 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

The study was conducted according to an internationally recognised method, and under GLP. The substance is considered to be adequately characterised. Therefore full validation applies.

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Version / remarks:

The study was performed closely following the standard DIN 51794:2003-05

Deviations:

no

Principles of method if other than guideline:

not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

inspected on 20 and 21 June 2017 / signed on 04 September 2017

Key result

Auto-ignition temperature:

350 °C

Atm. press.:

>= 989.2 - <= 1 027.6 hPa

Results of the preliminary test:

Temperatures where auto-ignition was detected are marked with +; temperatures where no auto-ignition was detected are marked with - in the table below. The amount of test item tested at each measurement is indicated as numbers of portions (1 portion: approximately 0.1 g).

Table 4.12.1: Auto-ignition temperature (preliminary test)

Preliminary test
portions	+ / -	Time lag / s
5	-	-
5	-	-
5	-	-
5	-	-
5	+	0
5	+	0
5	-	-
barometric pressure: 995.9 hPa / *1008.1 hPa

The lowest auto-ignition temperature of the test item was determined to be 378°C in the preliminary test.

Results of the Main tests:

Table 4.12.2: Auto-ignition temperature (summary)

Main test series	Auto-ignition temperature / °C	Portions	Time lag / s	Barometric pressure / hPa
1^stmain test (5 K)	378	5	0	989.7
1^stmain test (2 K)	358	6	5	989.2 - 1027.6
2^ndmain test (2 K)	355	5	5	994.7 – 1012.3
3^rdmain test (2 K)	363	5	5	992.7 - 992.8

The lowest auto-ignition temperature of the test item was determined to be 355°C in the main test.

The auto-ignition-temperatures were above 300 °C and the three lowest results of the tests with 2 K steps were within a range of 20 K. Therefore, the results were considered as valid.

Due to safety reasons and according to the guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5, giving a value of 350 °C (989.2 - 1027.6 hPa)

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 study was conducted under GLP according to standard DIN 51794:2003 -05 (listed in EU A.15 guideline).

Under the test conditions, the lowest temperature that will result in the ignition of the test item after being injected into the apparatus was determined as 350 °C between 989.2 and 1027.6 hPa. This value was determined using approximately 0.5g of test substance. The test substance showed auto ignition after 5 seconds.

Reference 2

Endpoint:

relative self-ignition temperature (solids)

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid having a melting point <= 160°C

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACh Annex VII, the study does not need to be conducted if the substance is a solid having a melting point <=160°C.
In addition, in the ECHA endpoint specific guidance on information requirements (R.7a, v6.0, July 2017, §R.7.1.12), "solids are considered under self heating substances" and "the UN Test N.4 is preferable to generate the information for this endpoint."

The substance is described as a green to brown sticky and highly viscous liquid to pasty solid (see endpoint 4.1) with a melting point < 4.9°C and the substance is flowable at a temperature of 73°C (see endpoint 4.2). Then, the substance is anticipated to be totally molten below 160°C and the determination of the relative self-ignition temperature is considered as not required.
Note that the substance is also described as potentially solid at ambient temperature and pressure. Therefore self-heating properties (and UN Test N.4) were considered in this dossier (see endpoint 4.13).

Description of key information

The auto-ignition temperature of the test item was stated as 350 °C (989.2 - 1027.6 hPa).

The determination of the relative self-ignition temperature for solids was waived considering that the substance is totally molten below 160°C.

No particular hazard is anticipated in normal conditions of storage.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

350 °C

Additional information

A GLP fully reliable experimental study, conducted according to a recognized EU 15 / DIN 51794 method, is available. Therefore, it is considered as a key study. The result is retained as key data.

 

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