Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Appearance / physical state / colour

Ethane- 1,2-diol, propoxylated, is a colourless and clear liquid (Currenta, 2009).

 

Melting point / freezing point

Ethane-1,2 -diol, propoxylated does not have a melting point (Currenta, 2009).

 

Boiling point

The boiling point of Ethane- 1,2-diol, propoxylated, is 298°C (Currenta, 2009).

 

Density

The relative density of Ethane-1,2 -diol, propoxylated is 1.04 at 20°C (Currenta, 2009).

 

Particle size distribution (Granulometry)

Waiving:

In accordance with column 2 of REACH Annex VII, the study does not need to be conducted as the substance is marketed or used in a non solid or granular form.

 

Vapour pressure

The vapour pressures of Ethane-1,2 -diol, propoxylated, were calculated to be 0.0323 Pa at 20 °C and 0.0529 Pa at 25 °C, according to OECD guideline 104 and EU method A.4 (LAUS GmbH, 2009).

 

Partition coefficient

The structure-fragment calculation method indicates a log Pow range of -1.00 to -0.30 for components of this UVCB mixture. The upper limit value of log Pow = -0.30 is used to conservatively represent partitioning of the components of this UVCB substance in the chemical safety assessment (Dow, 2010).

 

Water solubility

Ethane-1,2 -diol, propoxylated, is soluble in demineralized water at 20°C in each ratio to clear homogenous solutions (Currenta, 2009).

 

Surface tension

The surface tension of Ethane-1,2 -diol, propoxylated, is 38.4 mN/m diluted to 1 g/L in water at 20°C (Currenta, 2009).

 

Flash point

The flash point of Ethane-1,2 -diol, propoxylated, is 162.5°C at 1013 hPa (Currenta, 2009).

 

Auto flammability

The auto ignition temperature of Ethane-1,2 -diol, propoxylated, is specified as 310°C at 993 hPa when tested according to EC Test Procedure A 15 (DIN 51794; Currenta, 2009).

 

Flammability

Burning rate, solid:

According to REACH legislation, Annex VII, column II flammability does not need to be conducted since the substance is a liquid. Flammability for liquids is expressed as flash point.

Contact with water:

The structural formula (see page 9) of the test item contains none of the functional groups quoted in Manual of Tests and Criteria (fourth revised edition, appendix 6, article 5.3) which may react with water to emit flammable gases. Therefore, it can be concluded by expert judgement that ‘Ethane-1,2-diol, propoxylated' does not emit flammable gases in contact with water. The determination according to EU Method A.12 (Flammability (Contact with Water)) and UN Test N.5 (Flammability (Contact with water)) is not necessary (Currenta, 2009).

Pyrophoric properties:

Experience in production or handling shows that the substance does not ignite spontaneously on coming into contact with air at normal temperatures (i.e. the substance is known to be stable at room temperature for prolonged periods of time) (Currenta, 2010).

 

Explosiveness

The structural formula (see page 9) of the test item contains none of the functional groups quoted in Manual of Tests and Criteria (fourth revised edition, appendix 6, table A 6.1) or Bretherick’s – Handbook (6th Edition, Volume 2, p 128 ff) which may indicate explosive properties. Therefore, it can be concluded by expert judgement that ‘Ethane-1,2-diol, propoxylated' is not explosive. The determination according to EC Guideline A 14 is not necessary (Currenta, 2009).

           

Oxidising properties

The structural formula (see page 6) contains none of the functional groups quoted in ‘Manual of Tests and Criteria’ (fourth revised edition, appendix 6, article 6) which may indicate oxidizing properties. Therefore, it can be concluded by expert judgement that ‘Ethane-1,2-diol, propoxylated’ has no oxidizing properties. The determination according to EC Guideline A 21 is not necessary.

With application of EC-Guideline 1272/2008 (‘Globally Harmonized System of Classification and Labelling of Chemicals - GHS‘ Annex 1, article 2.13) the criteria for classification ‘Ethane-1,2-diol, propoxylated’ as ‘oxidizing liquid’ are not fulfilled (Currenta, 2009).

 

Stability in organic solvents and identity of relevant degradation products,

Data waiving:

According to Column 1 of Annex IX (EU REACH), testing is only required if the stability of the substance is considered to be critical. The guidance defines potentially critical as: (i) for solubility measurement (e.g. for octanol water distribution), (ii) for fortification or calibration standards, (iii) for dosing using a solvent in ecotoxicity studies, and (iv) for sample preparation for analytical verification or monitoring programs. None of the above applies to the substance. Therefore testing of stability in organic solvents is deemed scientifically unjustified. 

 

Dissociation constant

The homologous components of this UVCB substance possess ionizable hydroxy groups, whose estimated pKa values range from 14.4 to 14.5 for the lowest and 14.2 to 14.4 for the highest-molecular weight homologues. These are considered to be irrelevant for the chemical safety assessment (Dow, 2010).

 

Viscosity

The viscosity of Ethane-1,2-diol, propoxylated is specified as η20°C= 0.08577 Pa*s and η40°C= 0.02742 Pa*s (Currenta, 2009).