Registration Dossier

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 guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
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

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 factorΦbwas 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

σo     =      72.81 mN/m at 19.6 °C

Φb    =      σo/ σg

Φb    =      72.81 / 70.62. = 1.0311

 

where

 

Φb    =      calibration factor

σo     =      the surface tension of water at the test temperature

σg     =      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.