O,O-dibutyl hydrogen thiophosphate, compound with 1-octylamine (1:1)

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental starting date: 28 April 2016 Experimental completion date: 14 April 2017

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

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

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

O,O-dibutyl hydrogen thiophosphate, compound with 1-octylamine (1:1)

EC Number:

300-947-2

EC Name:

O,O-dibutyl hydrogen thiophosphate, compound with 1-octylamine (1:1)

Cas Number:

93964-99-9

Molecular formula:

C8H19N.C8H19O3PS

IUPAC Name:

octan-1-amine dibutyl sulfanylphosphonate

impurity 1

Reference substance name:

Octylamine

EC Number:

203-916-0

EC Name:

Octylamine

Cas Number:

111-86-4

Molecular formula:

C8H19N

IUPAC Name:

octan-1-amine

Test material form:

liquid

Specific details on test material used for the study:

Information as provided by the Sponsor. The Certificate of Analysis provided by the Sponsor is presented as Annex 1 (Please see Attachment Section of this Summary).

Identification: X-19575 Phosphorothioic acid, O,O-dibutyl ester, compd. with 1-octanamine, CASRN 93964-99-9
Appearance/Physical state: Amber colored viscous liquid
Batch: X-019575-00-00
Purity: 60 - 100%
Expiry date: 01 June 2017
Storage conditions: Room temperature, in the dark

Results and discussion

Surface tension

Key result

Surface tension:

43.5 mN/m

Temp.:

21.8 °C

Conc.:

1.131 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 A

Time (mins)	Reading (mN/m)	Temperature (°C)
77	44.0	21.8
87	43.5	21.8
97	43.5	21.8
107	43.5	21.8
118	43.5	21.8
127	43.5	21.8

Sample B

Time (mins)	Reading (mN/m)	Temperature (°C)
1213	43.5	21.8
1226	43.5	21.8
1237	43.5	21.8
1248	43.5	21.8
1259	43.5	21.8

Mean Sample 1 result (last 5 readings):         43.5 mN/m     pH of Sample A :       6.5

Mean Sample 2 result :                                 43.5 mN/m     pH of Sample B :       5.0

Mean result                :          43.5 mN/m

Temperature               :          21.8 ± 0.5 ºC

 

Applicant's summary and conclusion

Conclusions:

The mean surface tension of duplicate 90 % saturated solutions of test item in water has been determined to be 43.5 mN/m at 21.8 ± 0.5 °C. The test item was considered to be surface-active.

Executive summary:

The determination was carried out by a ring method, using a procedure 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 the Testing of Chemicals, 27 July 1995.

Conclusion

The mean surface tension of duplicate 90 % saturated solutions of test item in water has been determined to be 43.5 mN/m at 21.8 ± 0.5 °C. The test item was considered to be surface-active.