Registration Dossier

Ecotoxicological information

Toxicity to aquatic plants other than algae

Administrative data

Endpoint:
toxicity to aquatic plants other than algae
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
according to general accepted guidelines a minimum of 5 plants should be tested per concentration. In this study only 4 plants were used. As the study is well documented the study can be considered as reliable screening test to assess the effects on submerged macrophytes.

Data source

Reference
Reference Type:
publication
Title:
Zum Einfluß von Bor auf submerse Weichwasser-Makrophyten
Author:
Nobel W
Year:
1981
Bibliographic source:
Angew Bot 55: 501-514

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Test on effect on photosynthesis
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Perboric acid, sodium salt
EC Number:
234-390-0
EC Name:
Perboric acid, sodium salt
Cas Number:
11138-47-9
Molecular formula:
For detailed information on substance identity, molecular and structural formula see attached file AD_PBS_Substance_Identification (taken from ECB (2007) EU RAR Perboric acid)
IUPAC Name:
sodium hydroxy hydrogen borate
Details on test material:
NaBO2 x 2 H2O2 x 3 H2O, purity: no data

Sampling and analysis

Analytical monitoring:
not specified

Test organisms

Test organisms (species):
other: Elodea canadensis

Study design

Water media type:
freshwater
Total exposure duration:
21 d

Test conditions

Hardness:
1 °dH
pH:
6.5

Results and discussion

Effect concentrations
Duration:
21 d
Dose descriptor:
other: EC22
Effect conc.:
2 mg/L
Conc. based on:
other: boron
Basis for effect:
other: inhibition of photosynthesis
Details on results:
The foliage was damaged. Increased content of B in plants (0.30 mg B)

Any other information on results incl. tables

21d-EC22 concentrations:
25 mg/L related to sodium perborate
6.2 mg/L related to H2O2
2 mg/L related to boron

Applicant's summary and conclusion