Reaction mass of (2Z)-5-[(1R,3R,6S)-2,3-dimethyltricyclo[2.2.1.02,6]hept-3-yl]-2-methyl-2-penten-1-ol and (2Z)-2-methyl-5-[(1S,2R,4R)-2-methyl-3-methylenebicyclo[2.2.1]hept-2-yl]-2-penten-1-ol

Explosiveness

Link to relevant study record(s)

Reference

Reference 1

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 there are no chemical groups present in the molecule which are associated with explosive properties

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with REACh Annex VII / column 2, the study does not need to be conducted if there are no chemical groups associated with explosive properties present in the molecule.
According to Regulation (EC) N°1272/2008 (CLP) criteria and screening procedure (as listed in appendix 6 to the UN Recommendations on the Transport of Dangerous Goods - Manual of Tests and Criteria (6th revised edition, 2015) or in the ECHA endpoint specific guidance on information requirements (R.7a, v6.0, July 2017, §R.7.1.11), NO REACTIVE GROUP was identified in the chemical structures of the constituents.
Then explosive properties are not anticipated, and the acceptance procedure for Class 1 explosives shall not apply, no further testing is required.

Reference 2

Endpoint:

explosive properties of explosives

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Remarks:

No guideline is cited, but test conditions are sufficiently described. However, they do not fully comply with guideline requirements, and study was conducted non-GLP. The test substance is adequately identified. Therefore validation applies with restrictions.

Qualifier:

equivalent or similar to guideline

Guideline:

UN Manual of Tests and Criteria: Part I: Classification procedures, test methods and criteria relating to explosives of Class 1

Deviations:

yes

Remarks:

not conducted up to 500°C

Principles of method if other than guideline:

DTA screening test, in accordance with UN TDG, MTC Appendix 6.

GLP compliance:

no

Sample mass (mg)	Peak	T range of the peak [°C]	T peak max [°C]	dH decomp. [J/g]	Qmax [mW/g]	Remark
9.60	1	81 -137	111	-8	20	Weak exotherm
	2	254 -399	369	> -264	250	Medium exotherm

Interpretation of results:

study cannot be used for classification

Conclusions:

Based on Regulation (EC) N°1272/2008 (CLP) and UN MTC Appendix 6 criteria, the exothermal events were below the threshold of 500 J/g, but the test was not conducted up to 500°C.
Therefore the result is inconclusive with regard to classification.

Executive summary:

The thermal stability of the test substance was tested with Differential Thermal Analysis, in accordance with conditions recommended in UN MTC screening procedure.

Two successive exotherms were recorded, up to the maximum test temperature of 400°C, but the energy released was limited, resp. about 8 and 264 J/g.

Description of key information

No additional testing is required for explosive properties, based on chemical structures of constituents, and limited decomposition energy anticipated.

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

According to the screening procedure described in CLP, no structural alert was identified, which is sufficient for purpose.

Moreover, a DTA/DSC analysis was available as reliable supporting study, with a maximum decomposition energy observed of 264 J/g at 369°C. The test was not complete (not conducted up to 500°C), but the peak profile, wide and flat, suggest that the reaction is not particularly violent.

Justification for classification or non-classification

The chemical structures of the constituents of the substance meet the exemption criteria (no structural alert). The acceptance procedure does not apply.