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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:
2018-05-15 - 2018-11-16
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.9 (Flash-Point)
Version / remarks:
31 May 2008
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.6315 (Flammability)
Version / remarks:
August 1996
Deviations:
no
Qualifier:
according to
Guideline:
other: see 'Version / remarks"
Version / remarks:
UN Handbook "Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria" Rev. 6, 2015, Method 32.4 "Test methods used for determining flash point and viscosity"
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
non-equilibrium method closed cup
Flash point apparatus:
Pensky-Martens apparatus
Specific details on test material used for the study:
The test item was stored in a closed vessel under inert gas at room temperature (15.8 - 23.0°C).
Key result
Flash point:
26 °C
Atm. press.:
1 013 hPa

FINDINGS

Pre-Test for Safety

After cooling down ,from a temperature above the boiling point, no signs of decomposition were observed.

Determination of the Flash Point

Search (pre-Test): 26.8 °C

1. Determination: 26.5 °C (the test vessel was cooled down to a temperature of 8.5 °C before test starts)

2. Determination: 25.5 °C (the test vessel was cooled down to a temperature of 5.0 °C before test starts)

EVALUATION AND RESULT

The flash point is given as the mean value of the duplicate determinations. The measured flash point is therefore 26.0 ± 0.5 °C (corresponding to 299.2 ± 0.5 K). Based on this result, the substance is evaluated as a flammable liquid Cat 3 (following the UN Handbook "Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria" Rev. 6, 2015).

DISCUSSION

The difference between the two independent measurements was below 2 K. For this reason, the result is considered valid.

Interpretation of results:
other: Category 3 (flammable liquids) based on EU GHS criteria
Conclusions:
The measured flash point is 26.0 ± 0.5 °C (corresponding to 299.2 ± 0.5 K).
Executive summary:

The study was performed according to EU Method A.9, OPPTS 830.6315 and UN Manual Test Methods 32.4 under GLP-conditions.

First, a safety test was performed: approx. 3 mL of the test item was heated with a Bunsen burner up to the temperature of 140.1 °C. The appearance had not changed after cooling down.

Then, a pre-test and a main test with two experiments were performed using a flashpoint tester.

The flash point of the test substance is stated as 26.0 ± 0.5 °C (corresponding to 299.2 ± 0.5K). This value is the mean value of two independent determinations.

Description of key information

The study was performed according to EU Method A.9, OPPTS 830.6315 and UN Manual Test Methods 32.4 under GLP-conditions.

First, a safety test was performed: approx. 3 mL of the test item was heated with a Bunsen burner up to the temperature of 140.1 °C. The appearance had not changed after cooling down.

Then, a pre-test and a main test with two experiments were performed using a flash point tester.

The flash point of the test substance is stated as 26.0 ± 0.5 °C (corresponding to 299.2 ± 0.5K). This value is the mean value of two independent determinations.

Flash point of hexanal was described in several handbooks/puplications. Described properties are nearly the same: hexanal has a flash point of about 32 °C. This fits with the experimental determined value and leads to the same classification.

Key value for chemical safety assessment

Flash point at 101 325 Pa:
26 °C

Additional information

CRC Handbook:

Hexanal has a flash point of 32.0 °C

Sax Dang. Prop.:

Hexanal has a flash point of 32.2 °C.

Lange Phys. const/prop.:

Hexanal has a flash point of 32.2 °C.