Tetramethylammonium hydroxide

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 September 2012 - 17 December 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

(2008)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

(1995)

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Key result

Surface tension:

73.3 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Table: Surface tension measurements

 

Measurement	Time passed [minutes]	Surface tension [mN/m]
		Individual	mean	mean corrected (2)
1	31	71.3	71.9 (1)	73.3
2	32	71.8
3	33	72.3
4	34	71.9
5	35	71.9
6	36	71.8
7	37	71.9
8	38	72.1

 

(1) Mean from measurements 4 to 8.

(2) Multiplied by the calibration factor followed by correction according to Harkins-Jordan (W.D. Harkins, H.F. Jordan, J. Amer.Chem. Soc., vol 52, 1751, 1930).

Conclusions:

The surface tension of an aqueous test substance solution at 1 g/L was measured to be 73.3 mN/m at 20°C.

Executive summary:

Using the OECD harmonized ring method in a GLP study according to EC A.5 and OECD 115, the surface tension at 20°C of an aqueous solution of the substance at 1 g/L was determined to be 73.3 mN/m. According to the EC A.5 guideline the substance is not surface active.

Description of key information

Surface tension: 73.3 mN/m at 20°C (EC A.5, OECD 115: OECD harmonised ring method). The substance was concluded to be not surface active. 

Key value for chemical safety assessment

Surface tension:

73.3

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

1 000