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Physical & Chemical properties

Flash point

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Reference
Endpoint:
flash point of flammable liquids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
November 15 - November 22, 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 test substance is adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
EU Method A.9 (Flash-Point)
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
ISO 3679 (Determination of flash point - Rapid equilibrium closed cup method)
Version / remarks:
2015
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes (incl. QA statement)
Remarks:
Inspected on 20-21/06/2017 - Signed on 04 September 2017
Type of method:
equilibrium method closed cup
Flash point apparatus:
other: Normalab NPV310
Key result
Flash point:
ca. 56 °C
Atm. press.:
ca. 1 013 hPa

The following tables show the results of the measurements as temperatures where ignition (+) was detected and where not (-).

Table1: Preliminary test

Test item / ml

Starting temperature / °C

Temperature / °C

Ignition + / -

2

20

81

+

4

20

71

+

4

51

76

+

Table2: Main test

Test item / ml

Temperature / °C

Ignition + / -

Barometric pressure / hPa

2

71

-

1007.5

2

76

-

1007.5

2

81

-

1007.5

2

86

-

1007.5

2

91

-

1007.5

2

96

-

1007.5

4

101

-

1005.3

4

106

-

1005.3

4

111

-

1005.3

4

116

-

1005.3

4

121

-

1005.3

The results of the first 11 flash point determinations in the main test were not in accordance with the preliminary test. While the preliminary test showed ignitions at temperatures of 71 °C, 76 °C, and 81 °C the main test did not show ignitions at temperatures between 71 °C and 121 °C. It was concluded that the ignition is dependent on the test mode. In the preliminary test continuous repetitive dipping of the flame into the sample vessel is performed while the temperature is elevated. In the main test only one dipping of the flame is performed at constant temperature after 60 seconds (2 ml) or 120 seconds (4 ml) of equilibration.

In the interest of safety the main test was adapted. The following flash point determinations (see Table 3) were performed at constant temperature but with continuous dipping of the flame into the sample vessel (approximately every 10 seconds). The time after which ignition occurred was also recorded. The equilibration time was extended to 300 seconds.

Table3: Main test, continued

Test item / ml

Temperature / °C

Ignition + / -

Time until ignition occurred / s

Barometric pressure / hPa

2

71

+

90

1005.3

2

66

+

73

1005.3

2

61

+

70

1005.3

2

56

+

121

1005.3

2

51

-

- (up to 300)

1005.3

2

52

-

- (up to 300)

1005.3

2

53

-

- (up to 300)

1005.3

2

54

-

- (up to 300)

1005.3

2

55

-

- (up to 300)

1005.3

2

56

+

115

1005.3

2

55.5

-

- (up to 300)

1005.3

2

56

+

132

1005.3

2

55.5

-

- (up to 300)

1005.3

2

56

+

120

1005.3

2

55.5

-

- (up to 300)

1005.3

The lowest flash point corrected to 1013 hPa is rounded down with an accuracy of 0.5 °C: 56.0 °C.

Interpretation of results:
Category 3 (flammable liquids) based on GHS criteria
Conclusions:
The flash point of the test item is therefore 56.0°C (329.15 K) at 1013 hPa (equilibration time extended to 300 seconds).
Executive summary:

The study was performed in order to determine the flash point of test item according to EU A.9 guideline, using a Rapid equilibrium closed cup method (ISO3679, 2015).

The flashpoint of the test item is stated as 56.0°C (329.15 K) at 1013 hPa.

Therefore, test item is classiifed as FLAMMABLE LIQUID cat 3 according to UN GHS criteria and Regulation (EC) N°1272/2008 (CLP) criteria.

Description of key information

The flash point of test item was determined to be 56.0°C (329.15 K) at atmospheric pressure.

The test item is classified as FLAMMABLE LIQUID cat 3 according to UN GHS criteria and Regulation (EC) N°1272/2008 (CLP) criteria.

Key value for chemical safety assessment

Flash point at 101 325 Pa:
56 °C

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study.