Barium hydroxide

Toxicity to other aquatic organisms

Administrative data

Endpoint:

toxicity to other aquatic vertebrates

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

3 (not reliable)

Rationale for reliability incl. deficiencies:

other: No guideline study, insufficient documentation on physicochemistry or applied test method. No statistics were reported

Data source

Reference

Reference Type:

publication

Title:

Unnamed

Year:

1978

Materials and methods

Test guideline

Qualifier:

no guideline followed

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

barium(2+) dichloride dihydrate

EC Number:

600-412-6

Cas Number:

10326-27-9

IUPAC Name:

barium(2+) dichloride dihydrate

Test material form:

solid: crystalline

Details on test material:

Test substance: Barium chloride dihydrate
Molecular weight: 208.23 g/mol
Supplier: American Chemical Society
Purity: reagent-grade

Sampling and analysis

Analytical monitoring:

not specified

Test solutions

Vehicle:

no

Test organisms

Test organisms (species):

other: Spongilla lacustris

Details on test organisms:

gemmules form branches of the freshwater sponge; gemmules were dissected, washed at 4°C and incubated at 15°C

Study design

Test type:

not specified

Water media type:

freshwater

Limit test:

no

Total exposure duration:

72 h

Test conditions

Test temperature:

15 ± 1°C

Nominal and measured concentrations:

2 test concentrations: 0.1 and 1 mM

Details on test conditions:

distilled and purified freshwater

Reference substance (positive control):

not specified

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

72 h

Dose descriptor:

LOEC

Effect conc.:

< 137 327 µg/L

Nominal / measured:

nominal

Conc. based on:

element

Remarks:

fraction total assumed

Basis for effect:

other: germination

Remarks on result:

other: nr

Effect concentrations 2

Dose descriptor:

NOEC

Effect conc.:

13 733 µg/L

Nominal / measured:

nominal

Conc. based on:

element

Remarks:

fraction total assumed

Basis for effect:

other: hatching

Remarks on result:

other: nr

Effect concentrations 3

Dose descriptor:

LOEC

Effect conc.:

137 327 µg/L

Nominal / measured:

nominal

Conc. based on:

element

Remarks:

fraction total assumed

Basis for effect:

other: hatching

Remarks on result:

other: nr

Reported statistics and error estimates:

not reported

Applicant's summary and conclusion

Validity criteria fulfilled:

not specified

Conclusions:

This study followed no guidelines. It contains insufficient documentation on physico-chemical parameters and test methods. the results contain no statistics.