Reaction mass of stereoisomers of 4-METHYLENE-2-(2,2,3-TRIMETHYL-CYCLOPENT-3-ENYLMETHYL)-TETRAHYDRO-PYRAN and; 4-METHYL-6-(2,2,3-TRIMETHYL-CYCLOPENT-3-ENYLMETHYL)-3,6-DIHYDRO-2H-PYRAN and; 4-METHYL-2-(2,2,3-TRIMETHYL-CYCLOPENT-3-ENYLMETHYL)-3,6-DIHYDRO-2H-PYRAN

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
According to 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 structure.
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

Study period:

20-27 June 2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

The study was conducted according to an internationally recognised method, and under GLP. No deviation affected the quality of the study. The substance is considered to be adequately identified. Therefore full validation applies.

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

Version / remarks:

Regulation (EC) No 440/2008

Deviations:

no

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht (inspected on 29 & 30 November 2010 / signed on 11 April 2011)

Specific details on test material used for the study:

Storage condition of test material: The test item was stored dark and dry in a closed vessel at 2-8 °C.

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

6 mm

Remarks on result:

not thermal sensitive if heated under defined confinement

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

2 mm

Remarks on result:

not thermal sensitive if heated under defined confinement

Parameter:

sensitiveness to impact: impact energy (J)

Remarks:

40 J

Remarks on result:

not sensitive to impact using an impact energy of 40 J

Parameter:

sensitiveness to friction: friction load (N)

Remarks on result:

not required

Remarks:

n/a, liquid

Table 4.14/1: Explosiveness - results

 

Method	Number of conducts	Loading	Number of positive reactions	Assessment
Thermal Sensitivity	3 with 2 mm 3 with 6 mm	27 ml	0	not explosive
Mechanical Sensitivity (shock)	6 with 40 J	10 mm^3	0	not explosive
Mechanical Sensitivity (friction)	was not conducted

 

The following visual observations were made:

In the test for thermal sensitivity, the test item burned with a large, yellow-orange, sooting flame. In all conducts, burning time lay between 2 and 3 minutes. After all test item had burned, no further reaction was visible.

In the test for mechanical sensitivity (shock), formation of vapour was observed.

 

Discussion:

No signs of an explosive reaction could be observed in any of the tests.

Therefore, the test item is considered as "not explosive under the conditions of guideline EU A.14".

Interpretation of results:

study cannot be used for classification

Conclusions:

The test substance is not sensitive to heating and shock.
The test is inconclusive according to Regulation (EC) N°1272/2008 (CLP) criteria.
The test item can be considered as "Not explosive under the conditions of method EU A.14".

Executive summary:

The explosive properties of test item were tested under GLP, according to EU A.14 guideline.

 

In the test for thermal sensitivity (Koenen test), no explosion was observed. In the test for shock sensitivity (fall hammer), no explosion was observed using an energy of 40 J. The test for mechanical sensitivity (friction) was not conducted because of the liquid nature of the test item.

Description of key information

Testing not required, based on chemical structure.

Not explosive with regard to heat sensitivity (experimental).

Key value for chemical safety assessment

Explosiveness:

non explosive

Additional information

According to the screening procedure described in Regulation (EC) N°1272/2008 (CLP), the structure of the substance does not contain any chemical group associated with explosive properties.

Therefore, no further testing is required.

Moreover, a supporting experimental study for the determination of explosive properties, with regard to sensitivity towards heat and shock (friction not required for liquids) is available. This test was conducted according to previous Directive 67/548/EEC (DSD) classification criteria, so the conclusion cannot be extrapolated to CLP criteria, as the testing strategy and study design differ significantly. Nevertheless the Koenen tube test is common, and the negative result confirms that the substance is not sensitive to heat.

Justification for classification or non-classification

The substance is NOT classified as explosive according to CLP, based on the structural formula, that fulfills the screening procedure criteria.