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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:
13-16 Oct 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.9 (Flash-Point)
Qualifier:
according to
Guideline:
EPA OPPTS 830.6315 (Flammability)
Qualifier:
according to
Guideline:
ISO No., other: UN Manual Test Methods 32.4
Principles of method if other than guideline:
SOP of the laboratory: 118 009 64, "Bestimmung des Flammpunkts nach Pensky-Martens", edition 5 valid from 3 Dec 2012.
GLP compliance:
yes (incl. certificate)
Remarks:
Rheinland-Pfalz Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht, Kaiser-Friedrich-Strasse 7, D-55116 Mainz
Type of method:
closed cup
Flash point:
200.5 °C
Atm. press.:
ca. 1 013 hPa

Pre-test for safety:

The bubble chain was observed at approx. 306 °C and the chain broke at approx. 241 °C. Decomposition was observed after cooling down, indicated by a colour change from colourless to light yellow.

Determination of the flash point:

The results of determinations are presented in the table.

Program

Flash point,°C

Notes

SEI

211.0

Not used for calculation (pre-test)

ENI

192.5

Not used for calculation

ENI

204.5

Not used for calculation

ENI

200.5

Difference < 2K

ENI

200.5

The first two measurements were discarded because the difference between the expected flashpoint and the measured flash point was too high. The difference between the two values which were measured was below 2 K. For this reason, the determination was considered valid.

Description of key information

200.5 °C (EU A.9)

Key value for chemical safety assessment

Flash point at 101 325 Pa:
200 °C

Additional information

The flash point of the substance trihexyl phosphate (CAS No. 2528-39-4) was determined using the Pensky-Martens closed cup method.