Monophosphothiamine

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

09 Jan - 10 Jan 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Version / remarks:

adopted in 2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: OECD 113 Screening test for thermal stability and stability in air

GLP compliance:

no

Specific details on test material used for the study:

Storage conditions: Ambient temperature (10 to 30 °C), dry

Parameter:

other: Thermal stability via DSC measurement.

Remarks on result:

other: The heat of decomposition was < 500 J/g. The main test on explosive properties was not required.

Results
Thermal Stability
An endothermal effect in the temperature range of 160 to 185 °C was seen. No further endothermal nor exothermal effects were seen until the test end temperature at 500 °C. The test item showed a discolouring from white to black/brown after the test.

The second DSC measurement in a closed high pressure crucible under nitrogen with the test item showed 3 endothermal effects in the ranges of 150 to 180 °C, 190 to 235 °C and 245 to 450 °C. No further endothermal nor exothermal effects were seen until the test end temperature at 500 °C. The test item showed a discolouring from white to black/brown after the test. Results are summarized in Table 1.

Table 1 – Thermal Stability (DSC measurements)

Weight [mg]	Final temperature [°C]	Temperature range [°C]	Type of effect	Energy [J/g]
10.77	500	160 – 185	Endothermal	n.r.
11.08		150 – 180 190 – 235 245 - 450	Endothermal	n.r.

n.r.: not relevant

Explosive Properties
The heat of decomposition was below 500 J/g, therefore the main test on explosive properties was not necessary.

Description of key information

Not explosive (EU Method A.14., Thermal Stability)

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

Heat of decomposition determined by Differential Scanning Calorimetry was below 500 J/g. Main test on explosive properties not necessary.

Justification for classification or non-classification

The available data on explosive properties of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification: The exothermic decomposition energy is less than 500 J/g.