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Flash point

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Endpoint:
flash point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to guideline
Guideline:
ISO No., other: German standard method "DIN EN ISO 2719"
Deviations:
no
GLP compliance:
no
Type of method:
closed cup
Flash point:
104.5 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: average value
Flash point:
104 °C
Atm. press.:
1 013 hPa
Flash point:
105 °C
Atm. press.:
1 013 hPa

The lowest temperature at which the application of the ignition source causes the vapor of the test portion to ignite and propagate over the surface of the liquid was defined as the flash point.

Conclusions:
Pentanoic anhydride exhibited a flash point of 104.5 °C measured at 1013 hPa.
Executive summary:

The flash point of the substance was determined according to the German standard method DIN EN ISO 2719 (Procedure A) and was performed in a Pensky-Martens apparatus. Pentanoic anhydride exhibited a flash point of 104.5 °C measured at 1013 hPa.

Endpoint:
flash point of flammable liquids
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2001
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
EU Method A.9 (Flash-Point)
Deviations:
no
GLP compliance:
no
Type of method:
other: Pensky-Martens apparatus
Flash point:
105.5 °C
Atm. press.:
102.11 kPa

Since the flash point of the substance was known from literature (F.P. = 102 °C, Merck catalogue) no pretest had to be performed. The main determination consisted of 2 tests. Starting temperature was T = 80 °C, ignition trials every 1 K temperature rise were carried out.

Flash point (first test): 105 °C

Flash point (second test): 106 °C

Average value: 105.5 °C

The temperature was corrected due to atmospheric pressure.

Flash point of reference substance

In order to check the temperature measurement the flash point of a reference substance with a known value was tested.

Reference substance: 1,2-Propanediole

CAS-Number: 57-55-6

Manufacturer: Merck

Batch Number: K28567978

Flash point: 99°C (Nabert/Schön, Sicherheitstechnische Kennzahlen brennbarer Gase und Dämpfe, Deutscher Eichverlag GmbH, Braunschweig, 2. Auflage, 1991)

The main determination consisted of 3 tests. Starting temperature was T = 80 °C, ignition trials every 1 K temperature rise were carried out.

Flash point (first test): 104 °C

Flash point (second test): 103 °C

Flash point (third test): 103 °C

Average value: 103.3 °C

The temperature was corrected due to atmospheric pressure. As a conclusion the flash point of the reference subsatnce was determined to be at 103.5°C (101.12 kPa)

Conclusions:
The flash point of the substance was measured at 105.5 °C at atmospheric pressure of 102.11 kPa.
Executive summary:

The flash point of the substance was determined according to EU method A.9 and was performed in a Pensky-Martens apparatus. The measurement of the substance showed a result at 105.5 °C at atmosperic pressure of 102.11 kPa.

Description of key information

The flash point of pentanoic anhydride was measured at 104.5 °C at atmospheric pressure of 1013 hPa.

Key value for chemical safety assessment

Flash point at 101 325 Pa:
104.5 °C

Additional information

There is no classification for pentanoic anhydride resulting out of the study on the flashpoint.