Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The substance, (s)-2 -chloropropionic acid, is the single enantiomeric form of 2 -chloropropionic acid.

Specific data for physical and chemical properties is not readily available for the single enantiomeric form, however data on the racemic form is.

It is a well known fact that enantiomers differ from each other solely by their rotation of plane polarised light. In an achiral environment they are identical in all their physical and chemical properties. Therefore, the readily available data for the racemic form is equally valid for the single enantiomeric form, (s)-2 -Chloropropionic acid.

All the physical and chemical data supplied in section 4 of the dossier is for the racemic substance 2 -chloropropionic acid with the exception of pH (section 4.20) which was measured on (s)-2 -chloropropionic acid.

Summary of Physico-Chemical Properties

 Endpoint

 Result

Appearance/Physical State /Colour

 State@ 1013hPa, 20oC: Liquid

Colour: colourless to light yellow

Odour: Pungent

Melting point/freezing point

Melting Point -13 oC

Boiling Point

 185oC

Density

1.27 g/cm3 

Granulometry  Not required, substance is a liquid.
Vapour Pressure  0.5 kPa at 20oC
Partition Coefficient  0.82 at pH1 and 20.5oC.
Water Solubility  Miscible with water, nominal value of 100,000 mg/L assigned.
Surface Tension  71.9 mN/m at 20oC and 1020mg/L
Flash Point  107oC
Auto flammability  Auto-ignition temperature : 500oC.
Flammability  Non-flammable
Explosiveness  Non explosive
Oxidising properties  Not oxidising
 pH (1% vol aqueous solution)  1.83