Ethyl L-threoninate

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2007.08.31 to 2007.11.29

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP study performed in accordance with recognized test guideline.

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

(Platinium ring)

Principles of method if other than guideline:

NA

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Surface tension:

71.5 mN/m

Temp.:

20 °C

Conc.:

1 044 mg/L

The apparatus was calibrated with double-distilled water. The surface tension of the water was measured to be 72.75 mN/m at 20°C and as the literature value for this temperature is 72.75 the calibration factor is 1.000.

The surface tension of L-TEE was calculated as a mean value of 5 readings. The mean surface tension was calculated to be 71.5 mN/m for a test solution of 1 g/L at 20°C. As the value is significantly above 60 mN/m, correction using the Harkins-Jordan correction table was not necessary.

Conclusions:

The surface tension at 20°C of a nominal 1 g/L solution of L-TEE in double-destilled water was determined to be 71.5 mN/m. L-TEE is not a surface active substance.

Executive summary:

The surface tension of L-TEE was measured in accordance with Directive 92/69/EEC method A5 and OECD Guideline 115 (platinium ring).

The apparatus used, White Instruments Surface Tension (torsion) Balance, was calibrated using double-distilled water. The calibration factor was determined to be 1.000.

The mean surface tension was measured to be 71.5 mN/m for a test solution of 1 g/L at 20°C. As the value is significantly above 60 mN/m, correction using the Harkins-Jordan correction table was not necessary.

Description of key information

The surface tension of L-TEE is 71.5 mN/m for a 1 g/L at 20°C.

Key value for chemical safety assessment

Surface tension:

71.5

in mN/m at 20°C and concentration in mg/L:

1 000

Additional information

The surface tension of L-TEE was measured in accordance to Directive 92/69/EEC Method A5 and OECD Guideline 115 (platinium ring).

The apparatus used, White Instruments Surface Tension (torsion) Balance, was calibrated using double-distilled water. The calibration factor was determined to be 1.000.

The mean surface tension was measured to be 71.5 mN/n for a test substance concentration of 1 g/L at 20°C. As the value is significantly above 60 mN/m, correction using the Harkins-Jordan correction table was not necessary.