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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Auto flammability

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Administrative data

relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guideline
according to guideline
other: VDI 2263,Blatt 1
GLP compliance:
Other quality assurance:
other: The study was made under non GLP-conditions in a laboratory that is capable for working under GLP. The documentation is sufficient for registration purpose.

Test material

Constituent 1
Chemical structure
Reference substance name:
Benzyltris(dimethylaminato)phosphorus(1+) tetrafluoroborate(1-)
EC Number:
EC Name:
Benzyltris(dimethylaminato)phosphorus(1+) tetrafluoroborate(1-)
Cas Number:
Molecular formula:
benzyltris(dimethylamino)phosphanium; tetrafluoroboranuide
Test material form:
solid: crystalline
Details on test material:
Sample No.: 15-00714
< 0.2 % Moisture

Results and discussion

Relative self-ignition temperature (solids)
Key result
Relative self-ignition temperature:
240 °C

Any other information on results incl. tables

In the test for auto-ignition in the Grewer furnace, an endothermic process is first detected at a temperature of approx. 140 ° C for the pure test substance and for the test substance in mixture with kieselguhr. This can be assigned to the melting of the test object. The pure test object flows out of the wire basket and in this case no self-ignition can take place. A self-ignition was detected for the test substance in mixture with kieselguhr at a temperature of 240 ° C. This spontaneous ignition led to a maximum temperature of 400° C.

To determine the safe handling temperature under an air atmosphere, the temperature at which self-ignition starts in the Grewer furnace is used. A safety distance of 100 K is deducted from this temperature. In the present case, it can be considered that the solid can be safely handled until it is melted at 140° C under air. This temperature limit value applies to the air inlet or circulating air temperature as well as to the substance temperature during handling in the plant, as long as larger substance accumulations can be excluded. In particular, the limit value does not apply to handling over a long period, e.g. storage.
Deposits of the test object, in particular in materials with a high surface area (for example, insulations, seals, etc.), can only be safely handled up to a temperature of 140° C.

Applicant's summary and conclusion

On the basis of the observed self-ignition behavior in the Grewer furnace, the test object is classified as follows:

UN transport law: Due to the melting of the test object before the self-ignition is started, the test object is not classified as a self-heating substance in Class 4.2. GHS (CLP Guideline EC 1272/2008 Annex 1: 2.11): Due to the melting of the test object before the self-ignition is started, the test object is not classified as a self-heating substance.