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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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