Disodium 4-[4-[[5-[(2-bromo-1-oxoallyl)amino]-2-sulphonatophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-2,5-dichlorobenzenesulphonate

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosiveness

Type of information:

other: Expert Statement

Adequacy of study:

key study

Study period:

2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods

Qualifier:

according to guideline

Guideline:

other: Appendix 6 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria

Qualifier:

according to guideline

Guideline:

other: CLP, Annex I, Part 2, paragraphs 2.1.4.2 and 2.1.4.3

Qualifier:

according to guideline

Guideline:

other: 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

Principles of method if other than guideline:

The screening procedure used was as 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:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks on result:

not measured/tested

Screening evaluation:

Analysis of the molecular structure revealed, that an azo-group is present in the molecule representing an alert structure for explosive properties. Calculation of the oxygen balance according to the above mentioned formula is -183.45 and therefore slightly higher than the trigger value of -200.

Determination of the exothermic decomposition energy:

In the thermal analysis, a curve displayed one peak between 300 and 350 °C representing 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:

Reactive Yellow 039 is considered to be non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008.

Executive summary:

Analysis of the chemical structure of Reactive Yellow 39 reveals an azo-group as an alert 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 far 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

Analysis of the chemical structure of Reactive Yellow 039 reveals an azo-group as an alert 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 far 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

Reactive Yellow 039 is considered to be not explosive, hence it does not warrant classification as per the Regulation (EC) No. 1272/2008.