Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 24 May 1993 to 22 february 1994
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1994
Report Date:
1994

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
not specified
GLP compliance:
yes
Type of method:
ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Atrazine (technical)
Batch n. 2653, Ref 743
Purity: 97.5%
Expiry: stable until at least January 1995
Appaerance: white powder
Storage conditions: in the dark at 4°C

Results and discussion

Surface tension
Surface tension:
57.6 mN/m
Temp.:
21 °C
Conc.:
0.03 g/L

Any other information on results incl. tables

The measured value of the surface tension has been corrected for the weight of the liquid in the lamella drawn up by the ring as it lifts from the solution surface. The correction factor, applied for the correction, depends on the solution density, the ring diameter, the wire diameter and the acceleration du to the gravity.

Applicant's summary and conclusion

Conclusions:
the surface tension of atrazine (technica) has been determined as:
57.6 mN/m for a 90% saturated aqueous solution at 21°C.