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Physical & Chemical properties

Auto flammability

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Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10/03/2010 - 11/03/2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
performd under GLP
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Deviations:
no
Principles of method if other than guideline:
Not relevant
GLP compliance:
yes (incl. QA statement)
Key result
Relative self-ignition temperature:
275 °C
Remarks on result:
other:
Remarks:
at atm. press. of 98.5 kPa

A maximum temperature of 520 °C was measured in the sample cube during the exothermic reaction. At the end of the measurement, the test item was dark with lumps in different sizes.. For detailed results, see attached file results.doc.

Conclusions:
Chemically activated carbon is auto-flammable according to the criteria in EEC Directive 92/69 A.16.
Executive summary:

The auto-flammability of chemically activated carbon was determined according to EU Method A.16 under GLP. The auto-flammability temperature was found to be 275 degrees Celsius at 98.5 kPa. Therefore chemically activated carbon is considered to be auto-flammable according to the criteria in EEC Directive 92/69 A.16.

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: According to UN method, fully reported, non GLP
Qualifier:
according to guideline
Guideline:
other: Method N.4, UN ecommendations on transport, manual on Test& Criteria part III
GLP compliance:
no
Key result
Relative self-ignition temperature:
120 °C
Remarks on result:
other: TEST 3 negative.cube 100 mm. at 7 hrs 53 minutes the maximum temperature was 128,44 degrees C
Remarks:
at atm. press. of 1.0 atm
Key result
Relative self-ignition temperature:
140 °C
Remarks on result:
other: TEST 2 negative.cube 25 mm. at 55 minutes the maximum temperature was 143,44 degrees C
Remarks:
at atm. press. of 1.0 atm
Key result
Relative self-ignition temperature:
140 °C
Remarks on result:
other: TEST 1 positive.cube 100 mm. at 7.16 hrs the maximum temperature was > 400 degrees C
Remarks:
at atm. press. of 1.0 atm

a graph can be found on page 5 of the full study report

Conclusions:
The substance is classified as selfheating, class 4.2 packing group II according to method N 4 of the UN manual.
Executive summary:

The substance is classified as selfheating, class 4.2 packing group II according to method N 4 of the UN manual.

Endpoint:
relative self-ignition temperature (solids)
Type of information:
other: procedure form
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Not a study report or test result
Qualifier:
according to guideline
Guideline:
other: Methods N4, UN recommensations , Manual test& Criteria part II
GLP compliance:
no
Remarks:
Norit laboratory has been accredited by UK maritime & coastguar agency certificate nr 01/2000
Key result
Remarks on result:
other: Passed the test for exemption special provision 925 of the IMDG code

This special provision refers to self heating according to UN test N.4

Conclusions:
Activated carbon,low skeletal density is not self heating according to UN method N 4
Executive summary:

Activated carbon,low skeletal density is not self heating according to UN method N 4

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: According to UN method, fully reported, non GLP
Qualifier:
according to guideline
Guideline:
other: Method N.4, UN ecommendations on transport, manual on Test& Criteria part III
GLP compliance:
no
Auto-ignition temperature:
120 °C
Atm. press.:
1 atm
Remarks on result:
other: TEST 3 negative.cube 100 mm. at 8,68 hours the maximum temperature was 128,11 degrees C
Auto-ignition temperature:
140 °C
Atm. press.:
1 atm
Remarks on result:
other: TEST 2 negative.cube 25 mm. at 0,92 hours the maximum temperature was 141,88 degrees C
Auto-ignition temperature:
140 °C
Atm. press.:
1 atm
Remarks on result:
other: TEST 1 positive.cube 100 mm. at 7.16 hrs the maximum temperature was 375,99 degrees C
Relative self-ignition temperature:
120 °C
Remarks on result:
other: TEST 3 negative.cube 100 mm. at 8,68 hours the maximum temperature was 128,11 degrees C
Remarks:
at atm. press. of 1.0 atm
Relative self-ignition temperature:
140 °C
Remarks on result:
other: TEST 2 negative.cube 25 mm. at 0,92 hours the maximum temperature was 141,88 degrees C
Remarks:
at atm. press. of 1.0 atm
Relative self-ignition temperature:
140 °C
Remarks on result:
other: TEST 1 positive.cube 100 mm. at 7.16 hrs the maximum temperature was 375,99 degrees C
Remarks:
at atm. press. of 1.0 atm

a graph can be found on page 5 of the full study report

Conclusions:
The substance is classified as selfheating, class 4.2 packing group II according to method N 4 of the UN manual.
Executive summary:

The substance is classified as selfheating, class 4.2 packing group II according to method N 4 of the UN manual.

Description of key information

Some Activated Carbons - Low Density Skeleton show self heating properties as defined in the Dangerous Substances Directive, CLP and the UN recommendations on transport, manual of test and criteria, part III. Some Activated Carbons - Low Density Skeleton do not show self heating properties according to these definitions.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
275 °C

Additional information

The property auto flammability is not linked to a specific composition of Activated Carbon - Low Density Skeleton as the variation in this property occurs accros any range of compositions of Activated Carbon - Low Density Skeleton. Hence, the classification cannot be linked to a specific composition.

Testing an individual type of the is the only reliable method to assertain the autoflammability properties of that specific type of carbon. Included are therefore tests from various Activated Carbons - Low Density Skeleton.