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Ecotoxicological information

Toxicity to terrestrial plants

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Administrative data

Endpoint:
toxicity to terrestrial plants: long-term
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
4 (not assignable)

Data source

Reference
Reference Type:
review article or handbook
Title:
Tri-n-butyl Phosphate
Author:
International Programme on Chemical Safety
Year:
1991
Bibliographic source:
IPC-Environmental Health Criteria 112

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Review article
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Tributyl phosphate
EC Number:
204-800-2
EC Name:
Tributyl phosphate
Cas Number:
126-73-8
Molecular formula:
C12H27O4P
IUPAC Name:
tributyl phosphate
Details on test material:
No further information and no batch number is reported.
Specific details on test material used for the study:
Details on properties of test surrogate or analogue material:
Not relevant

Sampling and analysis

Analytical monitoring:
not specified
Details on sampling:
No information available

Test substrate

Vehicle:
not specified
Details on preparation and application of test substrate:
No information available

Test organisms

Species:
other: various
Details on test organisms:
Cotton, lucerne, rye grass, bean leaves

Study design

Test type:
not specified
Study type:
other: no data
Substrate type:
not specified
Limit test:
no
Remarks:
No information available
Post exposure observation period:
No information available

Test conditions

Test temperature:
No information available
pH:
No information available
Moisture:
No information available
Details on test conditions:
No information available
Nominal and measured concentrations:
No information available
Reference substance (positive control):
not specified

Results and discussion

Details on results:
Tributyl phosphate (TBP) is used as a constituent of cotton defoliants, producing leaf scorching, and is associated with an increase in the rate of leaf drying. TBP increases the drying rate of lucerne, resulting in excessive leaf loss. TBP applied by spraying as an emulsion (at a rate equivalent to 0.25% of freshly harvested leaf/weight) doubled the drying rate of ryegrass leaves. Leaf respiration stopped and did not resume in the subsequent 4 days.
TBP has been shown to damage the leaf surface and help herbicides penetrate bean leaves. There is no information on the effects of TBP on non-target plants, even at concentrations designed to produce desiccation of crop plants.
Results with reference substance (positive control):
No information available
Reported statistics and error estimates:
No information available

Any other information on results incl. tables

Tributyl phosphate (TBP) is used as a constituent of cotton defoliants, producing leaf scorching, and is associated with an increase in the rate of leaf drying. TBP increases the drying rate of lucerne, resulting in excessive leaf loss. TBP applied by spraying as an emulsion (at a rate equivalent to 0.25% of freshly harvested leaf/weight) doubled the drying rate of ryegrass leaves. Leaf respiration stopped and did not resume in the subsequent 4 days. TBP has been shown to damage the leaf surface and help herbicides penetrate bean leaves. There is no information on the effects of TBP on non-target plants, even at concentrations designed to produce desiccation of crop plants.

Applicant's summary and conclusion

Conclusions:
Tributyl phosphate (TBP) is used as a constituent of cotton defoliants, producing leaf scorching, and is associated with an increase in the rate of leaf drying.
Executive summary:

Tributyl phosphate (TBP) is used as a constituent of cotton defoliants, producing leaf scorching, and is associated with an increase in the rate of leaf drying.