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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Appearance / physical state / colour

Propylidynetrimethanol, ethoxylated is a colourless and organic liquid (Currenta, 2009).


Melting point / freezing point

Melting ranges: >= -39.2 -


Boiling point

The substance decomposes before reaching the boiling point.



The substanc's relative density is 1.12 Currenta (2007).


Particle size distribution (Granulometry)

Data 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 Lupranol VP 9236 were calculated to be 0.000264 Pa at 20°C and 0.000423 Pa at 25°C, according to OECD guideline 104 and EU method A.4 (LAUS GmbH, 2008).


Partition coefficient

The structure-fragment calculation method indicates a log Pow range of -1.56 to 1.82 for components of this UVCB mixture. The upper limit value of log Pow = 1.82 is used to conservatively represent partitioning of the components of this UVCB substance in the chemical safety assessment (West, 2010).


Water solubility

The water solubility of the test item Polyether V 531 is estimated as approx. 28 g/L (Currenta, 2009).


Surface tension

The surface tension of Propyliyntrimethanol, ethoxylated is 62.6 mN/m at 20°C of 1 g/L test item diluted in water (Currenta, 2009).


Flash point

Flashpoint: 213.5 °C.


Auto flammability

Autoflammability / self ignition temperature of Propylidynetrimethanol, ethoxylated is 370 °C at 1000 hPa.



The substance is not flammable (no solid).


Non explosive (expert statement).


Oxidising properties

Propylidynetrimethanol, ethoxylated has no oxidizing properties when tested according to EC Test Procedure A 21 (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 in 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 14.2 to 15.5 for the lowest- and 14.1 to 14.7 for the highest-molecular weight homologues. These are considere to be irrelevant for the chemical safety assessment (West, 2010).



The (dynamic) viscosity of Propylidynetrimethanol, ethoxylated is specified asη20 °C = 0.7425 Pa*s andη40 °C= 0.1676 Pa*s (Currenta, 2009). These results are supported by Perstorp (2010) that give the (dynamic) viscosity of Propylidynetrimethanol, ethoxylated asη20 °C = 0.83 Pa*s andη40 °C= 0.2 Pa*s. The values given by Currenta (2009) are taken to describe the key parameter "viscosity" of Propylidynetrimethanol, ethoxylated.