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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties


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Administrative data

Link to relevant study record(s)

Description of key information

density: 1.5078 g/cm³
rel. density: 1.5078

Key value for chemical safety assessment

Relative density at 20C:

Additional information

Relative Density


The relative density of Optiblanc ULD was determined by a gas comparison pyknometer method. The procedure conformed to EC Directive 92/69/EEC Method A3, and OECD Guideline 109.


The procedure was performed using a Micromeritics multivolume pyknometer model AccuPyc 1330TC. The apparatus was calibrated with a ball of known volume from five sets of pressure measurements of an inert gas (helium). The ball was placed in a measuring cup in the instrument and the test chamber was sealed and charged with helium. The gas was then allowed to expand into a further chamber of known volume and the volume of the test chamber was calculated from the pressure data using the gas laws. The density of the test substance was determined in a similar manner after the ball was replaced with test substance. The sample density was calculated from the weight and volume.