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Diss Factsheets

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
explosive properties of explosives
Type of information:
other: expert statement
Adequacy of study:
key study
Study period:
07 July 2021
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: See remark
Version / remarks:
The screening procedure is described in: - CLP, Annex I, Part 2, paragraphs 2.1.4.2 and 2.1.4.3 - Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria - Technical Guidance Document on the Information Requirements for REACH, Part 2 EWG 1-7, REACH Implementation Project (RIP) 3.3 Phase 2, chapter 7.1.11.3
Deviations:
no
Principles of method if other than guideline:
The screening procedure is described in:
- CLP, Annex I, Part 2, paragraphs 2.1.4.2 and 2.1.4.3
- Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria
- Technical Guidance Document on the Information Requirements for REACH, Part 2 EWG 1-7, REACH
Implementation Project (RIP) 3.3 Phase 2, chapter 7.1.11.3
GLP compliance:
no
Parameter:
other: oxygen balance
Remarks on result:
other: oxygen balance according to the above-mentioned formulas is -113.78 for main constituent 1 and -108.58 for main constituent 2 and therefore above the trigger value of -200.
Parameter:
other: Determination of the exothermic decomposition energy
Remarks on result:
other: energy release of about 243 J/g which demonstrated no critical energy release below the critical value of 500 J/g
Interpretation of results:
GHS criteria not met
Conclusions:
The test substance is considered as non-explosive.
Executive summary:

Test substance was assessed basis of expert statement for explosive properties of FAT 40879. Analysis of the molecular structures revealed, that that the molecule contains an unsaturated C-C bond and azo groups linked to aromatic rings in main constituent 1 as well as in main constituent 2 both of which might be associated with explosive properties according to the UN Recommendations and the Handbook of Reactive Chemical Hazards. Calculation of the oxygen balance according to the above-mentioned formulas is -113.78 for main constituent 1 and -108.58 for main constituent 2 and therefore above the trigger value of -200. The curve displays one exothermic peak up to 350 °C with an energy release of about 243 J/g, while this peak is considered to represent test substance decomposition. As a result, the energy release is below a critical trigger level of 500 J/g with the onset of energy release being below 500 °C. In summary, analysis of the chemical structure reveals some alerts for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200 but the determination of the exothermic decomposition energy demonstrated no critical energy release below the critical value of 500 J/g. Therefore, the substance is judged nonexplosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

Description of key information

Test substance was assessed basis of expert statement for explosive properties of FAT 40879. Analysis of the molecular structures revealed, that that the molecule contains an unsaturated C-C bond and azo groups linked to aromatic rings in main constituent 1 as well as in main constituent 2 both of which might be associated with explosive properties according to the UN Recommendations and the Handbook of Reactive Chemical Hazards. Calculation of the oxygen balance according to the above-mentioned formulas is -113.78 for main constituent 1 and -108.58 for main constituent 2 and therefore above the trigger value of -200. The curve displays one exothermic peak up to 350 °C with an energy release of about 243 J/g, while this peak is considered to represent test substance decomposition. As a result, the energy release is below a critical trigger level of 500 J/g with the onset of energy release being below 500 °C. In summary, analysis of the chemical structure reveals some alerts for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200 but the determination of the exothermic decomposition energy demonstrated no critical energy release below the critical value of 500 J/g. Therefore, the substance is judged nonexplosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

Key value for chemical safety assessment

Explosiveness:
non explosive

Additional information

Justification for classification or non-classification

The test substance has been considered to be non-explosive based on the expert statement, hence does not warrant classification according to the EU Classification, Labelling and Packaging of Substances and Mixtures (CLP) Regulation (EC) No. 1272/2008.