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Physical & Chemical properties

Density

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Description of key information

Relative density: 1.22096 +/- 0.000003 at 20 °C (293.15 K)

Key value for chemical safety assessment

Relative density at 20C:
1.2

Additional information

The study performed in experimental laboratory (Smolin, 2009, Bruno Bock) dedicated to estimate the density of the test material 3-mercaptopropionic acid has been chosen as a key study. The relative density has been determined to be 1.22096 +/- 0.000003 at 20 °C (293.15 K), by oscillating densitometry using procedures described in DIN 51757, complied with the method A3 of Commission Directive 440/2008/EC as of 30.05.2008 and method 109 of OECD testing guidelines for testing chemicals (27.07.1995).

The supporting study reports similar relative density value: 1.22 at 25 °C (Rampy, 1973, Dow). The key study reports density at recommended temperature. The differences in densities reported by key study and supporting study may be caused by differences in test substance compositions (no data available for supporting study).