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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
22 June 2010-13 September 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This study has been performed according to OECD and EC guidelines and according to GLP principles.
Qualifier:
according to guideline
Guideline:
other: United Nations (UN), UN no. ST/SG/AC.10/11/Rev.4: Recommendations on the Transport of Dangerous Goods, Part III: Classification Procedures, Test Methods and Criteria Relating to Explosives of Class 3, Class 4, Division 5.1 and Class 9, Test N.4 , 2003.
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Remarks on result:
no self ignition observed under the test conditions

No exothermic effect of the test substance was observed. It demonstrated that the test substance is “not a self-heating substance”. According to the guideline, no further testing was required.

After the experiment, the test substance had turned into a charred residue, and the volume of the test substance had decreased significantly. It indicated that the test substance had been molten, decomposed and/or reacted during the experiment.

Conclusions:
The self-heating temperature of Lowinox® AH25 was determined was determined by Test 1 of the Modified Bowes-Cameron Cage test.
Based on the results obtained, the test substance is considered “not a self-heating substance”.
Executive summary:

The aim of the study was to determine the following physico-chemical properties for Lowinox® AH25: Self-heating temperature in accordance with the following guidelines:

United Nations (UN), UN no. ST/SG/AC.1 0/11/Rev.4: Recommendations on the Transport of Dangerous Goods, Part Ill: Classification Procedures, Test Methods and Criteria Relating to Explosives of Class 3, Class 4, Division 5.1 and Class 9, Test N.4: "Test Method for Self-heating Substances", 2003.

 

The ability of the test substance to undergo oxidative self-heating was determined by Test 1 of the Modified Bowes-Cameron Cage test. The test substance was exposed to air at temperatures of 140 °C using a temperature controlled laboratory oven, cubic stainless steel wire sample containers of 100 mm wide, NiCr/Ni thermocouples and a temperature recording device.

A sample container with dimensions of 10 x 10 x 10 cm and a mesh size of 0.053 mm was filled with 305.6 g of the test substance. The container was housed in a stainless steel container cover of 11 x 11 x 11 cm with a mesh size of 0.60 mm.

One thermocouple was placed at the centre of the sample container. To avoid the effect of air circulation the sample container was installed in a stainless steel cage of 15 x 15 x 25 cm with a mesh size of 0.60 mm. The sample container was placed in the centre of the oven. The other thermocouple was placed between the sample container and the wall of the oven.

The oven temperature was raised to 140 °C ± 2 °C and kept for 24 hours. The temperature of the sample and the oven were recorded with time intervals of 30 minutes. After the experiment, the sample was cooled and the consistency of the test substance was determined.

 

Results

No exothermic effect of the test substance was observed. It demonstrated that the test substance is "not a self-heating substance". According to the guideline, no further testing was required.

After the experiment, the test substance had turned into a charred residue, the volume of the test substance had decreased significantly. It indicated that the test substance had been molten, decomposed and/or reacted during the experiment.

 

Conclusion

The self-heating temperature of Lowinox® AH25 was determined was determined by Test 1 of the Modified Bowes-Cameron Cage test.

Based on the results obtained, the test substance is considered "not a self-heating substance".

Description of key information

The self-heating temperature of Lowinox® AH25 was determined by Test 1 of the Modified Bowes-Cameron Cage test. In absence of an exothermic effect, the test substance is considered “not a self-heating substance”.

Key value for chemical safety assessment

Additional information

No exothermic effect of the test substance was observed. It demonstrated that the test substance is "not a self-heating substance". According to the guideline, no further testing was required.

After the experiment, the test substance had turned into a charred residue, the volume of the test substance had decreased significantly. It indicated that the test substance had been molten, decomposed and/or reacted during the experiment.

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