Disodium [3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxybenzenesulphonato(3-)][1-[[2-hydroxy-5-(phenylazo)phenyl]azo]-2-naphtholato(2-)]chromate(2-)

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21 May 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Expert statement for explosive properties of FAT 21095.

Qualifier:

no guideline followed

Principles of method if other than guideline:

The screening procedure described in the following guidances was used:
- 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

Specific details on test material used for the study:

Test Material: FAT 21095/D - Acid Brown 289

Key result

Parameter:

other: Presence of chemical structures associated with explosive properties

Remarks on result:

other: No such chemical alert structures are present in the molecule.

Key result

Parameter:

other: Oxygen balance

Value:

-173.26

Remarks on result:

other: Slightly higher than the trigger value of -200.

Key result

Parameter:

other: Determination of the exothermic decomposition energy

Remarks on result:

other: One exothermic peaks up to 350 °C with a total energy release of about 451 J/g.

Determination of the exothermic decomposition energy:

In order to assess if the substance Acid Brown 289 possesses the potential to rapidly release huge amounts of energy a thermal analysis (Differential Scanning Calorimetry) has been performed at the Analytical Department Huntsman Textile Effects (Germany) GmbH. The results of the measurement are shown in Annex 1.

The curve displays one exothermic peaks up to 350 °C with a total energy release of about 451 J/g. This peak is considered to represent substance decomposition. As a result, the overall energy release is below a critical trigger level of 500 J/g and the onset of energy release is below 500 °C.

Interpretation of results:

GHS criteria not met

Conclusions:

The substance is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

Executive summary:

Analysis of the chemical structure reveals no 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 an energy release below the critical value of 500 J/g. Therefore the substance is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.

Description of key information

The analysis of the chemical structure of the test substance FAT 21095 reveals no alerts for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200, and the determination of the exothermic decomposition energy demonstrated an energy release below the critical value of 500 J/g. Therefore, the substance is considered to be non-explosive 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

Justification for classification or non-classification

Acid Brown 289 is judged to be not explosive, hence it does not warrant classification as per the Regulation (EC) No. 1272/2008.