Registration Dossier
Registration Dossier
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Reaction mass of Disodium [3-{[4-chloro-2-(hydroxy-kO)-5-methoxyphenyl]diazenyl-kN2}-4-(hydroxy-kO)naphthalene-2,7-disulfonato(4-)](hydroxy)chromate(2-) and Trisodium [3-{[4-chloro-2-(hydroxy-kO)-5-methoxyphenyl]diazenyl-kN2}-4-(hydroxy-kO)naphthalene-2,7-disulfonato(4-)](dihydroxy)chromate(3-)
EC number: 953-115-1 | CAS number: -
Explosiveness
Administrative data
Link to relevant study record(s)
- Endpoint:
- explosive properties of explosives
- Type of information:
- other: Expert statement
- Adequacy of study:
- key study
- Study period:
- 22 June 2021
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- 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
- Specific details on test material used for the study:
- Substance identity:
Substance: Sodium [3-[(4-chloro-2-hydroxy-5-methoxyphenyl)azo]-4-hydroxynaphthalene-2,7-disulphonato(4-)]chromate(1-)
EC No.: 289-551-8
CAS No.: 89923-63-7 - Parameter:
- other: Oxygen balance
- Remarks on result:
- other: oxygen balance is -61.35 and -63.76 for main component 1 and main component 2, respectively, and is above the trigger value of -200.
- Parameter:
- other: exothermic decomposition energy
- Remarks on result:
- other: exothermic peak up to 315 °C with a total energy release of about 212.49 J/g and is below a critical trigger level of 500 J/g.
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Acid Blue 154 is considered as non-explosive.
- Executive summary:
In summary, analysis of the chemical structure reveals the presence of aliphatic azo-groups representing 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 non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.
Reference
Analysis of the above depicted molecular structures revealed, that that there are aliphatic azo-groups available in the molecule representing chemical alert structures. Calculation of the oxygen balance according to the above-mentioned formulas is -61.35 and -63.76 for main component 1 and main component 2, respectively, and therefore above the trigger value of -200.
Determination of the exothermic decomposition energy
To assess if the substance 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 curve displays one exothermic peak up to 315 °C with a total energy release of about 212.49 J/g, while this peak is considered to represent boiling off residual water. 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.
Description of key information
The test substance is considered as non-explosive.
Key value for chemical safety assessment
- Explosiveness:
- non explosive
Additional information
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 no critical energy release below the critical value of 500 J/g. Therefore, the substance is judged non-explosive according to Directive 67/548/EEC and Regulation (EC) 1272/2008 and no further testing is required.
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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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