Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental starting date: 05 July 2017. Experimental completion date: 23 August 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Specific details on test material used for the study:
Identification: Beta-Menadione
CAS No: 58-27-5
Description: light yellow powder
Batch number: J16090701
Purity: 99.2%
Expiry date: 06 September 2017
Storage conditions: room temperature, in the dark

Results and discussion

Surface tension
Surface tension:
>= 71 - <= 72 mN/m
Temp.:
20 °C
Conc.:
90 other: % saturated solution

Any other information on results incl. tables

Results

The readings, times and temperatures for the sample solutions are shown in the following tables:

Sample 1

Age of Solution (min) Reading (mN/m) Temperature (°C)
75 75 20
85 71.5 20
96 71 20
106 71.5 20
117 71.5 20
128 71 20

Sample 2

Age of Solution (min) Reading (mN/m) Temperature (°C)
144 73 20
155 70.5 20
165 71.5 20
176 71.5 20
186 71 20
196 71.5 20
207 71.5 20

Mean Sample 1 result : 71.3 mN/m (of last 5 results) pH of Sample 1 : 6.9

Mean Sample 2 result : 71.4 mN/m (of last 5 results) pH of Sample 2 : 6.9

Overall result : 71.5 ± 0.5 mN/m

Overall temperature : 20.0 ± 0.5 ºC

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface active.

Applicant's summary and conclusion

Conclusions:
The surface tension of a nominally 90 % saturated solution of test item in water has been determined to be 71.5 ± 0.5 mN/m at 20.0 ± 0.5 °C. The test item was considered not to be surface-active.
Executive summary:

Surface Tension: 71.5 ± 0.5 mN/m at 20.0 ± 0.5 °C (90 % saturated solution), using a ring method, designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. The test item was considered not to be surface-active.