2,2,2',2'-tetrakis(hydroxymethyl)-3,3'-oxydipropan-1-ol

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2009

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Principles of method if other than guideline:

An internal method (A1577) was used. The results from this method have been compared with results obtained with the ring method according to OECD guideline 115. Good correlation was found between the pendant drop method (A1577) and the ring method.
Because the solubility of the substance is greater than 1 g/L, a solution of 1g/L was used to determine the surface tension. A syringe was filled with approximately 10 mL of the solution and was attached to the instrument. The solution was mechanically expelled from the syringe so that it formed a drop on the tip of the needle. This drop was examined optically by the software and 20 images were collected at a rate of 1 image every 3 seconds. The surface tension was calculated by the shape of the drop and the result is expressed as a mean value of the 20 images. Because the surface tension was above 60 mN/m, only one measurement was performed.

GLP compliance:

no

Type of method:

other: pendant drop

Key result

Surface tension:

71 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Conclusions:

Surface tension: 71 mN/m at 20 °C

Executive summary:

The surface tension of Di-Pentaerythritol was determined with a contact angle meter instrument according to the principle pendant drop. An internal method (A1577) was used. The results from this method have been compared with results obtained with the ring method. Good correlation was found between the pendant drop method (A1577) and the ring method. The ring tensiometer is mentioned as a preferred method in “Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance”. Based on the results of the study, a surface tension of 71 mN/m at 20 °C was determined.

Description of key information

The surface tension of Di-Pentaerythritol was determined with a contact angle meter instrument according to the principle pendant drop. An internal method (A1577) was used. The results from this method have been compared with results obtained with the ring method. Good correlation was found between the pendant drop method (A1577) and the ring method. The ring tensiometer is mentioned as a preferred method in “Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance”. Based on the results of the study, a surface tension of 71 mN/m at 20 °C was determined.

Key value for chemical safety assessment

Surface tension:

71