2-(1-(3',3'-dimethyl-1'-cyclohexyl)ethoxy)-2-methyl propyl propanoate

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

Study period:

1995-03-28 to 1995-05-16

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. Purity and isomers composition are available from the notifier. Therefore full validation applies.

Qualifier:

according to guideline

Guideline:

EU Method A.14 (Explosive properties)

GLP compliance:

yes (incl. QA statement)

Remarks:

UK GLP compliance programme (inspected on 31 January 1994 / signed on 16 March 1994)

Specific details on test material used for the study:

Storage conditions: metal bottle at room temperature.

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

(mm)

Value:

6

Remarks on result:

negative (not further specified)

Parameter:

thermal sensitivity - Koenen test: diameter of the orifice plate

Remarks:

(mm)

Value:

2

Remarks on result:

negative (not further specified)

Parameter:

sensitiveness to impact: impact energy (J)

Value:

40

Remarks on result:

negative (not further specified)

The results obtained during testing are detailed below:

BAM fall hammer test

Test 1 to 6: There were no signs of ignition or explosion on impact. When the test assembly was dismantled there were no signs of decomposition.

Koenen steel tube test

6 mm orifice plate

Test	Time(s)	Observations
1	82	An orange flame was observed from the orifice. Test material bubbled from the orifice.
	94	The flame increased in size, the head of the tube was engulfed in flame. Burning test material ran down the sides of the tube.
	118	The flame further increased in size. Burning test material was "spat" from the orifice.
	131	The flame subsided.
	300	The test was stopped. The tube was recovered unchanged.
2	68	An orange flame was observed from the orifice. Test material bubbled from the orifice.
	89	The flame increased in size, the head of the tube was engulfed in flame. Burning test material ran down the sides of the tube.
	115	The flame further increased in size. Burning test material was "spat" from the orifice.
	134	The flame subsided.
	300	The test was stopped. The tube was recovered unchanged.
3	72	An orange flame was observed from the orifice. Test material bubbled from the orifice.
	90	The flame increased in size, the head of the tube was engulfed in flame. Burning test material ran down the sides of the tube.
	111	The flame further increased in size. Burning test material was "spat" from the orifice.
	135	The flame subsided.
	300	The test was stopped. The tube was recovered unchanged.

2 mm orifice plate

Test	Time(s)	Observations
1	65	An orange flame was observed from the orifice.
	88	The flame increased in size, the head of the tube was engulfed in flame. Burning test material ran down the sides of the tube.
	124	The flame turned to an orange jet.
	140	The jet returned to an orange flame.
	149	The flame subsided.
	300	The test was stopped. The tube was recovered unchanged.
2	83	An orange flame was observed from the orifice.
	100	The flame increased in size, the head of the tube was engulfed in flame. Burning test material ran down the sides of the tube.
	118	The flame turned to an orange jet.
	132	The jet returned to an orange flame.
	147	The flame subsided.
	300	The test was stopped. The tube was recovered unchanged.
3	76	An orange flame was observed from the orifice.
	97	The flame increased in size, the head of the tube was engulfed in flame.
	105	Burning test material ran down the sides of the tube.
	118	The flame increased in size.
	122	The flame turned to an orange jet.
	138	The jet returned to an orange flame.
	146	The flame subsided.
	300	The test was stopped. The tube was recovered unchanged.

Water content: 0.03172%w/w

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.

Executive summary:

The explosive properties of the substance were tested according to EU A14 guideline, for sensivity towards heating and shock, under GLP.

The BAM fall hammer was used with a 10 kg mass dropped from 0.4 m, and the test was repeated six times.

The Koenen test was performed with holes of diameter 6 mm and 2 mm, and repeated three times each.

All results were negative.

Description of key information

Testing not required, based on chemical structure. (waived)

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.

Additionally, a fully reliable, GLP, 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 criteria, based on the structural formula, that fulfills the screening procedure.