Sodium glyoxylate

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental starting date: 28 March 2017. Experimental completion date: 22 June 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Test guideline 2

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

Test material information

Constituent 1

Reference substance name:

Sodium glyoxylate

EC Number:

220-298-8

EC Name:

Sodium glyoxylate

Cas Number:

2706-75-4

Molecular formula:

C2H2O3.Na

IUPAC Name:

sodium oxoacetate

Specific details on test material used for the study:

Identification: Safelink SPM-01
Appearance/Physical state: colorless to slightly yellow powder
Batch: G150201
Purity: 99.9%
Expiry date: not supplied
Storage conditions: room temperature, in the dark

Results and discussion

Surface tension

Key result

Surface tension:

>= 74 - <= 75 mN/m

Temp.:

20 °C

Conc.:

1 g/L

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)
71	74.5	20.2
78	74.5	20.2
85	74.5	20.2
92	74.5	20.2
100	75	20.2

Sample 2

Age of Solution (min)	Reading (mN/m)	Temperature (°C)
132	74	20.2
139	74	20.2
145	74.5	20.2
152	74.5	20.2
160	74.5	20.2

Mean Sample 1 result : 74.6 mN/m       pH of Sample 1 : 6.3

Mean Sample 2 result : 74.3 mN/m       pH of Sample 2 : 6.3

Overall result : 74.5 ± 0.5 mN/m

Overall temperature : 20.0 ± 0.5 ºC

Discussion

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 solution of test item in water at a nominal 1 g/L has been determined
to be 74.5 ± 0.5 mN/m at 20.0 ± 0.5 °C. The test item was considered to be not surface active.

Executive summary:

74.5 ± 0.5 mN/m at 20.0 ± 0.5 °C (nominal 1 g/L solution), using a ring

method, designed to be compatible with Method A5 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 to be not surface-active.