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relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04 February 1999
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
other: United Nations, Recommendations on the transport of Dangerous Goods, Manual of Tests and Criteria; Part Ill, Section 33, Test N.4: "Test method for self-heating substances" (United Nations; New York and Geneva, Second revised edition 1995).
Principles of method if other than guideline:
- Principle of test: The purpose of the test was to determine whether a substance is able to reach a temperature of 200°C by self-heating under specified storage conditions.

- Short description of test conditions: The containers were placed in the centre of the oven. The oven temperature was raised to 140°C and kept there for 24 hours.
The temperatures of the samples and the oven were recorded in time intervals of 30 minutes.

- Parameters analysed / observed:Observations were made to determine whether the test substance reaches a temperature of 200°C by self-heating.
At the end of the test, the consistency of the test substance was determined
GLP compliance:
Specific details on test material used for the study:
- Source and lot/batch No.of test material: Source Sponsor, batch no 8135C/951020
- Expiration date of the lot/batch: 08 January 2000
- Purity test date: Not stated

- Storage condition of test material: room temperature in the dark
- Stability under test conditions: not stated
- Solubility and stability of the test substance in the solvent/vehicle: n/a
- Reactivity of the test substance with the solvent/vehicle of the cell culture medium:n/a

Key result
Relative self-ignition temperature:
> 140 °C
Remarks on result:
no self ignition observed under the test conditions
In the test where the container with dimensions 10 cm x 10 cm x 10 cm was used, no significant temperature rise was observed. After the test, no changes were observed in the appearance of the test substance. The sample temperature did not exceed 200°C. Therefore, the substance should not be classified in Division 4.2 (according to the criteria as described in the recommendation).
In conclusion, C.I.PIGMENT RED 81:5 - C.I.45160:4 should not be classified in Division 4.2; Packing Group Ill.

Description of key information

In conclusion, C.I.PIGMENT RED 81:5-C.I.45160:4 should not be classified in Division 4.2; Packing Group III.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
140 °C

Additional information