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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
publication
Title:
Effect of ammonia concentrations on growh of Chlorella vulgaris and nitrogen removal from media.
Author:
Tam NFY and Wong YS
Year:
1996
Bibliographic source:
Bioresource Technology 57: 45-50.

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
other: 18 day batch test
GLP compliance:
no

Test material

Constituent 1
Reference substance name:
Ammonium sulphate
EC Number:
231-984-1
EC Name:
Ammonium sulphate
Cas Number:
7783-20-2
IUPAC Name:
diammonium sulfate

Test organisms

Test organisms (species):
Chlorella vulgaris

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
18 d

Test conditions

Test temperature:
20 ºC
pH:
7+/- 0.2
Nominal and measured concentrations:
0, 10, 20, 40, 50, 60, 80, 125, 250, 500, 750, and 1000 mg N/L

Results and discussion

Effect concentrations
Duration:
18 d
Dose descriptor:
EC50
Effect conc.:
2 700 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
cell number

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
Ammonium sulphate is not classified as toxic for aquatic algae