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Flammability

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Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Key result
Test procedure:
other: not specified
Result:
negative outcome (no effect observed)
Interpretation of results:
GHS criteria not met
Conclusions:
Not a self-heating substance
Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
June 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Key result
Test procedure:
100 mm sample cube at 140°C
Max. temp. reached:
140
Induction time (h):
24
Result:
negative outcome (no effect observed)
Interpretation of results:
GHS criteria not met
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 Dec 2001 to 20 Dec 2001
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Qualifier:
according to guideline
Guideline:
other: VDI 2263 (national guideline, Germany)
Qualifier:
equivalent or similar to guideline
Guideline:
UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Key result
Test procedure:
burning time (test type not further specified)
Burning time:
> 45 s

Burning time > 45 sec. The substance is not readily combustible.

Interpretation of results:
GHS criteria not met
Conclusions:
Carbon black is not a flammable substance according to UN method N.1

Description of key information

The ignition temperature is > 600°C. Carbon black (solid: particulate/powder) - non nano, will burn slowly (smolder) at > 400°C and sustain combustion that may not be visible in the powder or pellet form. The burning process may be so slow as to not be obvious (no visible flames or smoke) unless stirred and sparks are apparent. Direct water spray or stream may spread the fire due to the burning powder floating on the water.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

Justification for classification or non-classification