4,4'-cyclohexylidenedi-o-cresol

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 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 section 7.11 of Column 2 of REACH Annex VII, it is considered justified to omit the testing for explosive properties as there are no chemical groups associated with explosive properties present in the substance. The substance does not contain any of the structural features mentioned in the UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria, Annex 6, Orange Book, 1999). The occurrence of other chemical groups associated with explosive properties as described in the literature was also considered. No such groups were present. The oxygen balance was calculated using the equation given in the UN Recommendations. Based on the molecular formula of C20H24O2 and a molecular weight of 296.4, the oxygen balance is approximately -270, well below the limit of -200 required for experimental testing. The exothermic decomposition energy was determined using Differential Scanning Calorimetry in a closed, gold plated vessel. No sharp peaks were observed. The decomposition energy was found to be about 115 J/g thus being significantly below the UN limit of 500 J/g. Therefore, applying the internationally recognised UN Recommendations criteria, the substance is not to be classified as explosive material and no experimental determination is warranted.

Description of key information

In accordance with section 7.11 of Column 2 of REACH Annex VII, it is considered justified to omit the testing for explosive properties as there are no chemical groups associated with explosive properties present in the substance.

The substance does not contain any of the structural features mentioned in the UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria, Annex 6, Orange Book, 1999). The occurrence of other chemical groups associated with explosive properties as described in the literature was also considered.  No such groups were present. The oxygen balance was calculated using the equation given in the UN Recommendations.  Based on the molecular formula of C20H24O2 and a molecular weight of 296.4, the oxygen balance is approximately -270, well below the limit of -200 required for experimental testing.

The exothermic decomposition energy was determined using Differential Scanning Calorimetry in a closed, gold plated vessel. No sharp peaks were observed.  The decomposition energy was found to be about 115 J/g thus being significantly below the UN limit of 500 J/g. Therefore, applying the internationally recognised UN Recommendations criteria, the substance is not to be classified as explosive material and no experimental determination is warranted.

Key value for chemical safety assessment

Explosiveness:

non explosive

Justification for classification or non-classification

In accordance with the criteria for classification as defined in Annex I, Regulation (EC) No 1272/2008, the substance does not require classification with respect to explosivity