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Auto flammability

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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-05-07 to 2018-05-25
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:
31 May 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and batch No. of test material: OUCHI SHINKO CHEMICAL INDUSTRIAL CO., LTD.; 608011
- Expiration date of the lot/batch: 2018-08-31

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Keep to the storeroom with suitable ventilation. Avoid fire, direct sunlight and moisture. Store at room temperature.
Key result
Relative self-ignition temperature:
365.1 °C

Temperature data

Table 1 Temperatures versus time

Time in min

Temperature (test item) in °C

Temperature (test item) in °C

5

21.4

20.4

60

37.6

46.9

120

69.8

82.7

180

103.8

118.8

240

136.5

154.9

300

170.9

190.3

360

206.4

225.5

420

237.3

260.4

480

280.2

297.6

540

320.5

333

591

400

365.1

Table 2 resulting heating rate

T1 in °C

20.4

t1 in min

5

T2 in °C

333

t2 in min

540

Heating rate in °C/min.

0.5843

Conclusions:
The test item should be considered as autoflammable with a relative self ignition temperature of 365.1 °C.
Executive summary:

A study was performed according to Regulation (EC) No 440/2008, method A.16 in order to determine the relative self-ignition temperature of the test item with the help of the automatic auto-ignition tester (LAUS, 2018). The auto-flammability behaviour was determined by placing the test item into a stainless steel cube and heating from room temperature to an oven temperature of 365.1 °C with the ZPA-3 oven. The nominal oven temperature was adjusted to 400 °C. As the self ignition at the temperature of 365.1°C was detected, the ZPA3 was stopped automatically. An increase of the temperature of the sample in comparison to that of the oven was detected. Furthermore, signs of ignition were observed. Therefore, the test item Zinc di(benzimidazol-2-yl) disulphide should be considered as auto-flammable with a relative self ignition temperature of 365.1 °C.

Description of key information

The test item should be considered as autoflammable with a relative self ignition temperature of 365.1 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
365.1 °C

Additional information

A study was performed according to Regulation (EC) No 440/2008, method A.16 in order to determine the relative self-ignition temperature of the test item with the help of the automatic auto-ignition tester (LAUS, 2018). The auto-flammability behaviour was determined by placing the test item into a stainless steel cube and heating from room temperature to an oven temperature of 365.1 °C with the ZPA-3 oven. The nominal oven temperature was adjusted to 400 °C. As the self ignition at the temperature of 365.1°C was detected, the ZPA3 was stopped automatically. An increase of the temperature of the sample in comparison to that of the oven was detected. Furthermore, signs of ignition were observed. Therefore, the test item Zinc di(benzimidazol-2-yl) disulphide should be considered as auto-flammable with a relative self ignition temperature of 365.1 °C.