Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The test substance is a clear liquid with a melting temperature of -31ºC. A boiling point could not be determined as reaction and/or decomposition of the test substance was observed at > 175°C.The reported relative density is 0.99 and the vapour pressure is 1.6 Pa at 20ºC. 

The partition coefficient of the UVCB substance could not be determined experimentally, but modelling from the two main constituents was performed and led to a log Kow of 1.75 for isophoronediamine (58%) and a log Kow of 6.44 was estimated for IPDA-BADGE-IPDA (31%). Taking into consideration that the modelling is related to the neutral molecules that only appear at pH 10 and above, due to the fact that IPDA-BADGE-IPDA is many times protonated at pH 7 (azote groups), the molecule will be then charged positively four times at neutral pH.

Therefore, given the low LogKow value for IPDA which was estimated to be 1.75 but known to be experimentally of 0.99 and the above mentioned data for IPDA-BADGE-IPDA, as well as the high molecular weight of the other constituents (>1000) which make the constituent not bioavailable. Therefore, the key value used for the chemical safety assessment is the experimental determined value form the main component (Isophoronediamine, IPDA) of 0.99.

The main constituent of test substance is soluble at 404 g/L. The test substance has a flash point of 116ºC, an auto-ignition temperature of 395ºC and a dynamic viscosity of 28541 mm2.s.

Due to the complexity of the molecular structure of the substance and the presence of multiple constituents, it was not possible to determine the dissociation constants experimentally. The test substance is neither flammable in contact with water or air, nor explosive. It doesn't possess oxidising properties.