Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Bis(4-tert-butylcyclohexyl) peroxydicarbonate is a white organic solid with characteristic odour. The substance does not have a distinct melting point. The melting range of bis(4-tert-butylcyclohexyl) peroxydicarbonate was determined to be 86.6 to 89.9 °C. Decomposition of the test item was observed before boiling. Therefore, the boiling point could not be determined.

The density of bis(4-tert-butylcyclohexyl) peroxydicarbonate is 1.1025 g/cm³ at 20.2 °C. The particle size (mass median diameter) is 96 µm. The vapour pressure of bis(4-tert-butylcyclohexyl) peroxydicarbonate at 20 °C was determined to be < 0.01 Pa or 1.0E-04 mbar.

Experimental determination of the partition coefficient (n-octanol/water) was technically not feasible as it is not possible to ascertain whether the substance degrades by hydrolysis in the test solution or in the analytical equipment (HPLC).

QSAR estimation (EPISuite, KOWWIN v1.68) results in a log Kow of 8.34 for bis(4-tert-butylcyclohexyl) peroxydicarbonate.

The water solubility was estimated to be at maximum 5.6 mg/L (at 5 °C) in the course of a hydrolysis study.

The self-accelerating decomposition temperature (SADT) of di-(4-tert-butylcyclohexyl) peroxydicarbonate is +40 °C. The OP-type of the substance (UN number 3114) is as follows: "Organic peroxide type C, solid, temperature controlled". The test item does not detonate and does not deflagrate rapidly.

The substance has no explosive properties because it is not classified as Organic Peroxide Type B (reference: CLP Regulation, section 2.15.2.2, and UN Recommendations on the Transport of Dangerous Goods, 16th revised edition, Section 2.5.3.2.4; see also ECHA guidance on the application of the CLP criteria, section 2.14.)

The stability in organic solvents is not considered to be critical and testing is therefore not required. This is due to the fact that for organic peroxides at maximum market concentrations there is extensive experience in handling/shipment, supporting the stability in the solvents used (or even needed for stabilising reasons). In some cases, approval by authorities has been obtained (e.g. statements from German BAM), specifying suitable solvents. In addition, in the context of toxicity studies, analytical data support and confirm the stability of the substance in relevant solvents.