Reaction mass of 3,4,5-trichlorophthalic acid, strontium salt and 3,4,6-trichlorophthalic acid, strontium salt and 3,4-dichlorophthalic acid, strontium salt and 3,5-dichlorophthalic acid, strontium salt and 3,6-dichlorophthalic acid, strontium salt and 3-chlorophthalic acid, strontium salt and 4,5-dichlorophthalic acid, strontium salt and 4-chlorophthalic acid, strontium salt

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2019-10-09 to 2019-10-30

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Version / remarks:

Annex, Part A

GLP compliance:

no

Key result

Relative self-ignition temperature:

374 °C

Remarks on result:

other: The test was conducted at atmospheric pressure.

Relative self-ignition

A self-heating process was observed at 374 °C at atmospheric pressure (Table 2).

Table 2: Temperature/time curve (extract of raw data)

Time (seconds)	Oven temperature (°C)	Sample temperature (°C)
46812	373.6	375.0
46814	373.7	375.1
46816	373.7	375.2
46818	373.7	375.3
46820	373.8	375.4
46822	373.8	375.5
46824	373.9	377.4
46826	373.9	380.9
46828	373.9	405.2
46830	373.9	469.4
46832	373.9	544.3
46834	374	613.2
46836	374	650.7
46838	374	670.4
46840	374	681.2
46842	374	686.4
46844	374.1	687.4

After the performance of the test there still was a small amount of the test item left in the cube. The colour of the solid test item after the test was grey.

Melting point

Results of the DSC experiment are summarized in Table 3.

Table 3: Results of the DSC experiment

Heating phase	Endothermic effect	Pre-Test	Test
1	Onset [°C]	209.08	212.12
	Peak Maximum [°C]	219.74	223.69
2	Onset [°C]	-	Not detected
	Peak Maximum [°C]	-	Not detected

With the cyclic method, no endothermic peak could be detected during the second heating phase. The loss of the endothermic peak after the first heating cycle and the mass loss of 2.2 % indicate the sublimation of one constituent of the test item. No melting point up to 400 °C could be detected with the melting point device. Only a colour change of the solid test item from white to beige could be observed. Based on these results, no melting point up to the self-ignition temperature could be reported.

Conclusions:

A self-ignition temperature of 374 °C at atmospheric pressure was found for the test item.

Executive summary:

The relative self-ignition temperature of the test item was determined according to EU Method A.16. Based on results from DSC measurements and determinations with a heating device, no melting point up to the self-ignition temperature could be reported. A self-ignition temperature of 374 °C at atmospheric pressure was found for the test item.

Description of key information

The relative self-ignition temperature of the test item was determined according to EU Method A.16. Based on results from DSC measurements and determinations with a heating device, no melting point up to the self-ignition temperature could be reported. A self-ignition temperature of 374 °C at atmospheric pressure was found for the test item.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

374 °C