Disodium {sulfonylbis[4,1-phenylenediazene-2,1-diyl(1-ethyl-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridine-5,3-diyl)]}dimethanesulfonate

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

study conducted betwenn: 04-Nov-2010 and 05- Nov 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Test material

Test material information

Constituent 1

Reference substance name:

Acid Yellow RN 2903

IUPAC Name:

Acid Yellow RN 2903

Details on test material:

Identification: Acid Yellow RN 2903
Batch Number: Vers. Kilo 6, 26.05.2009
Purity: 65.7 %
Expiry Date: August 01, 2015
Storage Conditions: At room temperature at about 20 °C

Results and discussion

Surface tension

Surface tension:

63.1 mN/m

Temp.:

19.6 °C

Conc.:

1.007 g/L

Any other information on results incl. tables

The calibration factorΦ_bwas determined to be 1.0311 for double distilled water (Table1). The data are part of Harlan Laboratories' instruments files and a copy is presented in the raw data of the present study.

 

Table 2 shows the individual measurements for the surface tension of the aqueous test item solution. From these, the mean and the corrected value for the given solution were calculated and are also shown in Table 2.

The tabulated values represent rounded results obtained from calculation using the exact raw data.

Table1       Determination of the Calibration Factor Using Water

Time expired	Temperature	Surface tension [mN/m]		Calibration factor
		measured	mean value calculated from the bold values
[hours:min]	[°C]		σg	Φb
00:30	19.6	70.9	70.62	1.0311
00:31	19.6	70.7
00:32	19.6	70.6
00:33	19.6	70.5
00:34	19.6	70.5
00:35	19.6	70.5

 

 

with

σ_o     =      72.81 mN/m at 19.6 °C

Φ_b    =      σ_o/ σ_g

Φ_b    =      72.81 / 70.62. = 1.0311

 

where

 

Φ_b    =      calibration factor

σ_o     =      the surface tension of water at the test temperature

σ_g     =      measured value of the surface tension of water

                  at the test temperature

Table 2       Determination of Surface Tension for the Test Item Solution

Time expired	Temperature	Surface tension	[mN/m]
		measured	mean value calculated from the bold values	mean value corrected for calibration	σ1corrected for Harkins-Jordan
[hours:min]	[°C]	[mN/m]	(σ *)	(σ 1)	(σ )
First sample
	19.6	62.2	62.03	63.96	63.38
	19.6	62.1
	19.6	62.0
00:33	19.6	62.0
00:34	19.6	62.0
00:35	19.6	61.9
Second sample
00:30	19.6	61.5	61.52	63.43	62.82
00:31	19.6	61.6
00:32	19.6	61.6
00:33	19.6	61.4
00:34	19.6	61.5
00:35	19.6	61.5

 

Mean value from both samples:                                                σ = 63.1 mN/m

 

 

 

Applicant's summary and conclusion

Conclusions:

The surface tension of Acid Yellow RN 2903 in water (at a concentration of about 1 g/L) was determined to be 63.1 mN/m at 19.6 °C.
Based on the criteria as outlined in the EEC Guideline and the results of this study, Acid Yellow RN 2903 has to be considered as a not surface active substance.

Executive summary:

The surface tension of Acid Yellow RN 2903 in water (at a concentration of about 1 g/L) was determined to be

63.1mN/m at 19.6 °C.

 

Based on the criteria as outlined in the EEC Guideline and the results of this study, Acid Yellow RN 2903 has to be considered as a not surface active substance.