Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Biological effects monitoring

Currently viewing:

Administrative data

Endpoint:
biological effects monitoring
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1979

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Filed study
GLP compliance:
no
Type of study / information:
Field study

Test material

Constituent 1
Chemical structure
Reference substance name:
Urea
EC Number:
200-315-5
EC Name:
Urea
Cas Number:
57-13-6
Molecular formula:
CH4N2O
IUPAC Name:
urea
Details on test material:
It is assumed that the purity is 100%

Results and discussion

Any other information on results incl. tables

Stay et al. (1978) investigated the effects on stream organisms of fertilizing second growth Douglas fir in the Cascade mountains of western Oregon with urea at the rate of 225 kg N/ha (equivalent to 482 kg urea/ha) . They found no significant effects on algal growth potential, stream macroinvertebrates, or caged rainbow trout fingerlings.

Applicant's summary and conclusion

Conclusions:
Stay et al. (1978) investigated the effects on stream organisms of fertilizing second growth Douglas fir in the Cascade mountains of western Oregon with urea at the rate of 225 kg N/ha (equivalent to 482 kg urea/ha) . They found no significant effects on algal growth potential, stream macroinvertebrates, or caged rainbow trout fingerlings.
Executive summary:

Stay et al. (1978) investigated the effects on stream organisms of fertilizing second growth Douglas fir in the Cascade mountains of western Oregon with urea at the rate of 225 kg N/ha (equivalent to 482 kg urea/ha) . They found no significant effects on algal growth potential, stream macroinvertebrates, or caged rainbow trout fingerlings.

This study is considered relevant and reliable for the risk assessment.