4'-Butyl-4-ethoxy-2,3-difluoro-1,1'-biphenyl

Flash point

Link to relevant study record(s)

Reference

Endpoint:

flash point of flammable liquids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2016-10-19 to 2017-02-09

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.9 (Flash-Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

ISO 3679 (Determination of flash point - Rapid equilibrium closed cup method)

Deviations:

no

GLP compliance:

no

Type of method:

closed cup

Flash point apparatus:

Setaflash apparatus

Key result

Flash point:

204.5 °C

Atm. press.:

1 013 hPa

Table 1. Preliminary test results

Test item / g	Temperature / °C	Ignition +/-
2	50	-
4	100	-
4	150	-
4	200	-
4	250	+
4	220	+
4	210	+
4	205	+
4	202.5	-

+: ignition was detected
-: ignition was not detected

Table 2. Main test results

Test item / g	Temperature / °C	Ignition +/-	Barometric pressure / hPa
4	204.0	-	1010.1
4	204.5	+	1010.1
4	204.0	-	1010.1
4	204.5	+	1010.1
4	204.0	-	1010.1
4	204.5	+	1010.1
4	204.0	-	1010.1

+: ignition was detected
-: ignition was not detected

The lowest flash point was corrected to 1013 hPa and rounded down with an accuracy of 0.5 °C. The flash point of the test item was determined to be 204.5 °C.

Interpretation of results:

GHS criteria not met

Conclusions:

The flash point of the test item was determined to be 204.5 °C under atmospheric pressure (1013 hPa).

Executive summary:

The test item is a solid with low melting point (36 °C), therefore, for safety reasons a flash point study was also conducted with the test item.

A study was conducted according to Regulation (EC) No 440/2008 method A.9 and ISO 3679 to determine flash point of the test item using a closed cup method. The start temperature for the main test (204 °C) was chosen based on the preliminary test. Therefore, 4 mL of the test item are filled in the cup and heated to the estimated temperature. Then the substance was maintained for at least 1 minute at this temperature. The flame was dipped in the cup and it was checked if ignition occurred. The measured flash point at atmospheric pressure was corrected to a standard pressure of 1013 hPa. The flash point was determined to be at 204.5 °C (corrected to the ambient pressure). Thus, the flash point of the test item was determined to be 204.5 °C (corrected and rounded down to the nearest multiple of 0.5 °C) at 1013.25 hPa.

Description of key information

The flash point of the test item was determined to be 204.5 °C under atmospheric pressure (1013 hPa).

Key value for chemical safety assessment

Flash point at 101 325 Pa:

204.5 °C

Additional information

The test item is a solid with low melting point (36 °C), therefore, for safety reasons a flash point study was also conducted with the test item.

A study was conducted according to Regulation (EC) No 440/2008 method A.9 and ISO 3679 to determine flash point of the test item using a closed cup method (reference 4.11-1). The start temperature for the main test (204 °C) was chosen based on the preliminary test. Therefore, 4 mL of the test item are filled in the cup and heated to the estimated temperature. Then the substance was maintained for at least 1 minute at this temperature. The flame was dipped in the cup and it was checked if ignition occurred. The measured flash point at atmospheric pressure was corrected to a standard pressure of 1013 hPa. The flash point was determined to be at 204.5 °C (corrected to the ambient pressure). Thus, the flash point of the test item was determined to be 204.5 °C (corrected and rounded down to the nearest multiple of 0.5 °C) at 1013.25 hPa.