Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

1,6 -Hexanediol dimethacrylate (1,6 -HDDMA) is a clear colourless to yellowish liquid at 20°C and 1013 hPa with an ester-like odour.

The melting point of 1,6 -HDDMA was determined to be 2.11 °C at 1013 hPa (OECD 102).

No boiling point of 1,6 -HDDMA was determined because of decomposition at temperatures greater than 100 °C a theoretically boiling point was

calculated to be approximately 190 °C at 1013 hPa according to DIN 53171.

The relative density of 1,6 -HDDMA is reported to be 0.998 g/cm³ at 20 °C (DIN 51757).

In accordance with column 2 of REACH regulation annex VII, a granulometry test does not need to be conducted as the substance is a liquid.

The vapour pressure of 1,6 -HDDMA is calculated to be 0.64 Pa at 25°C (modified grain method, EPIWIN).

The n-Octanol/Water partition coefficient (log Kow) of 1,6 -HDDMA is reported to be 4.08 (OECD 117) at ambient temperature.

The water solubility of 1,6 -HDDMA is reported to be 23 mg/L at 20°C (OECD 105).

The flash point of 1,6 -HDDMA is reported to be 117 °C at 1013 hPa (ASTM D 93 / Pensky Martens Closed Cup).

According to REACH Regulation (Annex XI, 1.), the study on flammability does not need to be conducted if the available data are sufficient for assessment. For 1,6 -HDDMA, a test on flash point is available. Pyrophoricity and flammability on contact with water are not expected based on a consideration of the structure of the substance.

In accordance with column 2 of REACH regulation annex VII, explosive properties testing does not need to be conducted as there are no chemical groups associated with explosive properties in the molecule. 1,6 -HDDMA is non-explosive.

In accordance with column 2 of REACH regulation annex VII, oxidising properties testing does not need to be conducted on the basis of chemical structure.

In accordance with column 1 of REACH regulation annex IX, stability in organic solvents testing is not required as stability of the substance is not considered critical. The test substance has no particular reactivity towards typical solvents and is not used in solution.

In accordance with column 2 of REACH regulation annex IX, dissociation constant testing does not need to be conducted as there are no dissociable groups.

The static viscosity of 1,6 -HDDMA is reported to be 6.33 mm²/s at 20°C and 3.69 mm²/s at 40°C (OECD 114).