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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Appearance

At ambient temperature and pressure, dimethylolpropionic acid is a white crystalline solid with a slight odour (Analytical Chemistry, Perstorp Holding AB, 2009).

Melting point

The melting point of dimethylolpropionic acid is 439 K (166 °C) (Analytical Chemistry, Perstorp Holding AB, 2009).

Boiling point

The boiling point of dimethylolpropionic acid is 455 K (182 °C) at 101.3 kPa (Analytical Chemistry, Perstorp Holding AB, 2009).

Density

The density of dimethylolpropionic acid is 1.37 at 20 °C (relative to water at 4 °C) (Analytical Chemistry, Perstorp Holding AB, 2009).

Granulometry

The inhalable fraction (< 100 µm) of dimethylolpropionic acid is 75% (Analytical Chemistry, Perstorp Holding AB, 2009).

Vapour pressure

The vapour pressure of dimethylolpropionic acid was predicted to be 0.00058 Pa at 25 °C using SPARC and MPBPWIN calculation methods. Since the vapour pressure was predicted to be below 1.0 Pa, and such low vapour pressures are experimentally very difficult to perform. Therefore, performing a test was considered technically not feasible. Substances with low vapour pressure are not likely to vaporise and become airbone (Analytical Chemistry, Perstorp AB, 2009).

Partition coefficient

The partition coefficient (log Kow) for dimethylolpropionic acid is -1.1 at 25 °C (Analytical Chemistry, Perstorp Holding AB, 2009).

Water solubility

The solubility of dimethylolpropionic acid in water is 101 g/L at 20°C (Analytical Chemistry, Perstorp Holding AB, 2009).

Surface tension

The surface tension of dimethylolpropionic acid is 72 mN/m at 20°C (Analytical Chemistry, Perstorp Holding AB, 2009).

Flash point

According to "Endpoint specific guidance R.7.1.9.1" flash point does not have to be determined for solids.

Autoflammability

No self-ignition temperature was found for dimethylolpropionic acid below 400 °C (Analytical Chemistry, Perstorp Holding AB, 2009).

Flammability

Dimethylolpropionic acid is non flammable (Analytical Chemistry, Perstorp Holding AB, 2009).

Explosiveness

Examination of the structure indicates that there are no groups associated with explosive properties. Therefore, negative results can be predicted and no testing for explosive properties has been carried out.

Oxidising properties

Due to the structural composition of the substance it is not considered to be oxidising. The substance does not contain any of the components listed in “Endpoint specific guidance R.7.1.13.3 table R.7.1-29”. According to “Endpoint specific guidance R.7.1.13.4 no experimental testing has to be conducted if the substance due to structural composition is considered not to be oxidising.

Stability in organic solvents

The stability in organic solvents is not considered critical to ensure confidence in other test results for other endpoints. Therefore testing is not needed to be conducted according to “Endpoint specific guidance R.7.1.16”.

Dissociation constant

The dissociation constant of dimethylolpropionic acid (pKa) is 4.68 at 20 °C (Analytical Chemistry, Perstorp Holding AB, 2009).

Viscosity

According to “Endpoint specific guidance R.7.1.18.4” viscosity determination is not required for solids.