2,6-Diamino-4,5,6,7-tetrahydrobenzothiazole

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 october 2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was conducted in GLP compliance and in accordance with several internationally established guidelines (OECD, EEC, see below).

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2004

Report date:

2004

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

SND 919 Precursor 2 (SND 855 BS)

IUPAC Name:

SND 919 Precursor 2 (SND 855 BS)

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

- Name of test material (as cited in study report): SND 919 Precursor 2 (SND 855 BS); SND 919 Precursor 2 (SND 855)
- Molecular formula (if other than submission substance): C7H11N3S
- Molecular weight (if other than submission substance): 169.25
- Structural formula attached as image file (if other than submission substance): see Reference substance
- CAS number: 104617-49-4
- Physical state: grey solid powder
- Analytical purity: 98.0%
- Purity test date: 17 october 2004
- Lot/batch No.: 14
- Expiration date of the lot/batch: october 2005
- Storage condition of test material: at room temperature, dark and dry

Results and discussion

Surface tension

Surface tension:

71.2 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Any other information on results incl. tables

Table 1 Time dependence of the surface tension after transferring the solution to the measurement vessel

Surface tension (mN/m)	Equilibrium time (sec)
58.9	24
64.4	43
67.3	60
69.9	82
70.8	105
71.0	134

Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

Table 2 Measured surface tension values and equilibrium times

Surface tension (mN/m)	Equilibrium time (sec)
71.0	134
71.9	144
71.0	142
70.5	138
71.2	134

Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension of the solution

Applicant's summary and conclusion

Conclusions:

A surface tension value of 71.2 mN/m at 20°C of a 1000 mg/L was obtained for the test item in a reliable study conducted according to an appropriate OECD test method. According to EC testing directive 440/2008 A.5 the test item is not considered to be surface active.