Registration Dossier
Registration Dossier
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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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EC number: 225-306-3 | CAS number: 4767-03-7
Endpoint summary
Administrative data
Description of key information
Appearance
At ambient temperature and pressure, dimethylolpropionic acid is a white crystalline solid with a slight odour.
Melting point
The melting point of dimethylolpropionic acid is 463 K (190 °C).
Boiling point
The boiling point of dimethylolpropionic acid cannot experimentally be determined due to decomposition.
Density
The density of dimethylolpropionic acid is 1.37 at 20 °C (relative to water at 4 °C).
Granulometry
The inhalable fraction (< 100 µm) of dimethylolpropionic acid is 75%.
Vapour pressure
The vapour pressure of dimethylolpropionic acid was predicted to be 0.00058 Pa at 25 °C using SPARC and MPBPWIN calculation methods.
Partition coefficient
The partition coefficient (log Kow) for dimethylolpropionic acid is -1.1 at 25 °C.
Water solubility
The solubility of dimethylolpropionic acid in water is 101 g/L at 20°C.
Surface tension
The surface tension of dimethylolpropionic acid is 72 mN/m at 20°C.
Flash point
Not relevant for solids.
Autoflammability
No self-ignition temperature was found for Bis-MPA.
Flammability
Dimethylolpropionic acid is non flammable, non-pyrophoric and does not emit flammable gases in contact with water.
Explosiveness
Examination of the structure indicates that there are no groups associated with explosive properties.
Oxidising properties
Due to its structural composition Bis-MPA is not considered to be oxidising.
Stability in organic solvents
The stability in organic solvents is not considered critical.
Dissociation constant
The dissociation constant of dimethylolpropionic acid (pKa) is 4.68 at 20 °C.
Viscosity
Not required for solids.
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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