Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The substance is an UVCB dark brown/black powder with a characteristic odour.

In a DSC analysis it showed decomposition beginning at 262 °C.

Relative density was determined by means of a pycnometer OECD 109 and the result value was D at 20 °C 1.5518.

Granulometry is of considerable importance for the toxic properties of a substance as it influences aspects such as: the route of exposure of humans and toxicity by inhalation; the choice of route of administration for animal testing; the efficiency of uptake in an organism; the distribution in the environment. The substance presented a granulometry mass median aerodynamic diameter (MMAD) = 48.7 µm, tested according to the OECD 110. This granulometry can be considered as inhalable fractions.

Less than the 0.2% in volume of the test item has a particle size <= 4 µm (respirable fraction -the mass fraction of particles that reaches the alveoli).

According to Annex VII of REACH Regulation1907/2006, column 2, the study of vapour pressure does not need to be conducted for this substance but the lowest value accepted by EUSES has been reported for a complete Risk assessment (0.0000001 Pa).

Partition coefficient was determined in HPLC (OECD 117) and was stated as < 0.3 (log Pow).

The tested substance is considered very soluble by OECD 105 (> 1000 g/L)

According to Annex VII of REACH Regulation1907/2006, column 2 no surface activity is expected or can be predicted; therefore the testing can be waived. As solid, the substance has no a flash point and the test can also be waived.

The uto-flammability value is 280.5 °C, and it is not flammable, explosive and it is deemed to be potentially not oxidising based on the chemical structure, the oxygen balance values and the known experience in the handling and use of the substance.