1-3 dihydroxy-2,4bis-(4-(2-sulfooxyethanesulfonyl)-phenylazo) benzene disodium salt

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosive properties of explosives

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance contains chemical groups associated with explosive properties which include oxygen, but the calculated oxygen balance is less than - 200

Justification for type of information:

The substance is used in a mixture with our main product Reactive Black 5_17095-24-8_BLENDWELL SA.

registration number: 01-2119471334-41-0008
submission number: PA330069-52
Decision number: SUB-D-2114220218-60-01/F

Upon the chimical reaction is finished, the black 5 is added to the substance to produce other mixtures
the orange is present in the black 5 in a percentage between 2 and 4.5%

Reactive Black 5_17095-24-8_BLENDWELL SA is not explosive

Analysis of the chemical structure reveals at least two azo groups being present in the molecular structure representing chemical
alert structures 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 isrequired.

Reason / purpose for cross-reference:

data waiving: supporting information

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

other:

Version / remarks:

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

Qualifier:

according to guideline

Guideline:

other:

Version / remarks:

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

Qualifier:

according to guideline

Guideline:

other:

Version / remarks:

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:

Screening based on chemical structure analysis in silica and established calculation models

Key result

Remarks on result:

not measured/tested

Screening evaluation

No experimental test data according to EU Method A.14 or comparable methods for Reactive Blendazol Orange are available.

Considering that explosive properties are associated with the presence of certain chemical groups in the molecule, a screening evaluation can be conducted aimed to identify the presence of such reactive groups within the molecular structure harvesting the capability for a rapid high energy release.

According to CLP Regulation examples of groups which may indicate explosive properties are:

-       C-C unsaturation (e.g. acetylenes, acetylides, 1,2-dienes);

-       C-Metal, N-Metal (e.g. Grignard reagents, organo-lithium compounds);

-       Contiguous nitrogen atoms (e.g. azides, aliphatic azo compounds, diazonium salts, hydrazines, sulphonylhydrazides);

-       Contiguous oxygen atoms (e.g. peroxides, ozonides);

-       N-O (e.g. hydroxyl amines, nitrates, nitro compounds, nitroso compounds, N-oxides, 1,2-oxazoles);

-       N-halogen (e.g. chloramines, fluoroamines);

-       O-halogen (e.g. chlorates, perchlorates, iodosyl compounds).

Analysis of the above depicted molecular structure revealed, that at least two azo groups representing chemical alert structures for explosive properties are present in the molecule.

Calculation of the oxygen balance according to the above mentioned formula is -87 and therefore higher than the trigger value of -200

Interpretation of results:

GHS criteria not met

Conclusions:

non explosif

Executive summary:

According to the CLP Regulation (EC 1272/2008) oxidising solid means a solid substance or mixture which, while in itself is not necessarily combustible, may, generally by yielding oxygen, cause, or contribute to, the combustion of other material.

Blendazol Orange is not classified because is incapable of reacting exothermically with combustible materials.

Description of key information

Screening evaluation

No experimental test data according to EU Method A.14 or comparable methods for Reactive Blendazol Orange are available.

Considering that explosive properties are associated with the presence of certain chemical groups in the molecule, a screening evaluation can be conducted aimed to identify the presence of such reactive groups within the molecular structure harvesting the capability for a rapid high energy release.

According to CLP Regulation examples of groups which may indicate explosive properties are:

-       C-C unsaturation (e.g. acetylenes, acetylides, 1,2-dienes);

-       C-Metal, N-Metal (e.g. Grignard reagents, organo-lithium compounds);

-       Contiguous nitrogen atoms (e.g. azides, aliphatic azo compounds, diazonium salts, hydrazines, sulphonylhydrazides);

-       Contiguous oxygen atoms (e.g. peroxides, ozonides);

-       N-O (e.g. hydroxyl amines, nitrates, nitro compounds, nitroso compounds, N-oxides, 1,2-oxazoles);

-       N-halogen (e.g. chloramines, fluoroamines);

-       O-halogen (e.g. chlorates, perchlorates, iodosyl compounds).

Analysis of the above depicted molecular structure revealed, that at least two azo groups representing chemical alert structures for explosive properties are present in the molecule.

Calculation of the oxygen balance according to the above mentioned formula is -87 and therefore higher than the trigger value of -200

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

According to the REACH Regulation, Annex VII, Column 2, the study does not need to be conducted because the substance is incapable of reacting exothermically with combustible materials, for example on the basis of the chemical structure (e.g. organic substances not containing oxygen or halogen atoms and these elements are not chemically bonded to nitrogen or oxygen, or inorganic substances not containing oxygen or halogen atoms

Justification for classification or non-classification

In summary, analysis of the chemical structure reveals at least two azo groups being present representing chemical alert structures for explosive properties. The calculated chemical oxygen balance is above the trigger value of -200

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.