Tetrasodium 3-[[4-[[4,6-bis-[(3-sulfonatoprop-1-yl)thio]-1,3,5-triazin-2-yl]amino]-2-methyl-5-methoxy-phenyl]azonaphthalene-1,5-disulfonate

Explosiveness

Description of key information

Non-explosive, EU Method A.14, Calmels 1996.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

The potential for the test material to explode was determined in a battery of tests used to assess heat and mechanical sensitivity of the test material, performed by Calmels (1996). The study was performed under GLP conditions and in accordance with the standardised guideline EU Method A.14. Based on the principles for assessing data quality defined by Klimisch et al (1997), this study was assigned a reliability score of 1.

A flame test was performed to determine the heat sensitivity of the test material over a 5 minute observation period. Two series of tests were performed in triplicate; the first series using a nozzle plate with a hole of 6 mm diameter and the second using a hole of 2 mm diameter.

Shock and friction tests were performed to determine the mechanical sensitivity of the test material. Six replicate shock tests were performed using a 10 kg mass falling from a height of 0.4 m (40 J). Six replicate friction tests were performed with a 353 newtons loading. Meta-dinitrobenzene was used as a reference substance in all three tests.

Under the conditions of the test, the test material was not considered to present a danger of explosion in the thermal and mechanical sensitivity tests. The test material was therefore determined to be non-explosive.

The test methods required for assessment under Regulation (EC) No. 1272/2008 (UN Recommendation on Transport of Dangerous Goods) differ slightly from those described in Regulation (EC) No. 440/2008. Tests A.14 and E.1 differ in that the latter is tested to a smaller limiting diameter (respectively 2mm vs 1mm), and hence is a more sensitive test. As such, the available data is not adequate for the requirements of Regulation (EC) No. 1272/2008.

Inspection of the molecular structure of the substance did not identify any functional groups identified in the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Appendix 6, Table A6.1, as being associated with explosive properties. As a result, and in combination with the above test results, further testing is not considered to be necessary.

Justification for classification or non-classification

In accordance with criteria for classification as defined in Annex I, Regulation 1272/2008, the test material does not require classification as explosive as it produced negative results in the early stages of all the explosive tests performed and assessment of the structure of the test material did not indicate and groups present on the molecule associated with explosivity in accordance with the provisions described in theUN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Appendix 6, Table A6.1.