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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The data are summarized in the peer-reviewed literature. The studies were not performed under Good Laboratory Practices nor according to a validated testing guideline; however, the data are well documented and scientifically acceptable.

Data source

Reference
Reference Type:
publication
Title:
Effects of Halogens on Algae-I. Chlorella sorokiniana
Author:
Kott, Y., and Edlis, J.
Year:
1969
Bibliographic source:
Water Res., Vol. 3, Iss. 4, pp. 251-256.

Materials and methods

Test guideline
Qualifier:
no guideline required
Principles of method if other than guideline:
No testing guideline was available when these studies were performed. Standard acute toxicity testing methods were employed.
GLP compliance:
no

Test material

Constituent 1
Reference substance name:
Hypobromous acid, sodium salt
IUPAC Name:
Hypobromous acid, sodium salt
Details on test material:
- Name of test material (as cited in study report): Hypobromous acid, sodium salt
- Other: Bromine dissociates in aqueous solutions to hypobromous acid (Beckwith et al., 1996).

Sampling and analysis

Analytical monitoring:
not specified

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Chlorella sp.
Details on test organisms:
Chlorella sorokiniana, 225 cells/mL

Study design

Test type:
other: Renewal and static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
20 h
Remarks on exposure duration:
An 18-h exposure was also performed.
Post exposure observation period:
Not reported

Test conditions

Hardness:
Not reported
Test temperature:
18 h exposure = 28-32 ºC
20 h exposure = 30 ºC
pH:
18 h and 20 h exposure = pH 7.0
Dissolved oxygen:
Not reported
Salinity:
Not reported
Nominal and measured concentrations:
18 h exposure = measured concentration of 1000 micrograms/L.
20 h exposure = measured concentrations with a mean value of 600 micrograms/L and a range from 200 to 600 micrograms/L.
Reference substance (positive control):
no

Results and discussion

Effect concentrationsopen allclose all
Duration:
18 h
Dose descriptor:
other: Not reported
Effect conc.:
>= 1 000 µg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
cell number
Duration:
20 h
Dose descriptor:
other: Not reported
Effect conc.:
ca. 600 µg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
other: mortality
Remarks on result:
other: Renewel, range from 200 to 600 micrograms/L
Duration:
20 h
Dose descriptor:
other: Not reported
Effect conc.:
ca. 600 µg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
other: mortality
Remarks on result:
other: Static, range from 200 to 600 micrograms/L

Applicant's summary and conclusion

Conclusions:
An 18-hour effect concentration on population growth was reported at a concentration of 1000 micrograms/L. The 20-hour effect concentration was 600 micrograms/L under renewel and static conditions.