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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2014
Report date:
2014

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
Deviations:
no
GLP compliance:
yes

Test material

Constituent 1
Reference substance name:
oxocalcium; oxomagnesium; silanedione
EC Number:
610-130-5
Cas Number:
436083-99-7
Molecular formula:
Amorphous glass consisting of SinO(3n-1)2(n-1) Polymeric anions ionically bonded to Ca2+ and Mg2+ cations or other alkaline earth cations
IUPAC Name:
oxocalcium; oxomagnesium; silanedione
Details on test material:
- Name of test material (as cited in study report): Isofrax, Carbawool(sic)

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
samples were taken from control and test groups for testing

Test solutions

Vehicle:
no
Details on test solutions:
PREPARATION AND APPLICATION OF TEST SOLUTION (especially for difficult test substances)
- A nominal amount of test item was added to the test water to give the 100 mg/L loading rate.

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
TEST ORGANISM
- Common name: Daphnia magna
- Strain/clone: Straus
- Justification for species other than prescribed by test guideline: Standard as per test guideline
- Age at study initiation (mean and range, SD): not specified
- Weight at study initiation (mean and range, SD): Not specified
- Length at study initiation (length definition, mean, range and SD): Not specified

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
48 h
Remarks on exposure duration:
Standard as per OECD guideline
Post exposure observation period:
Not required

Test conditions

Hardness:
not specified in available information
Test temperature:
not specified in available information
pH:
not specified in available information
Dissolved oxygen:
not specified in available information
Salinity:
Not specified
Conductivity:
Not specified
Nominal and measured concentrations:
Nominal: Control and 100 mg/L (nominal loading rate)
Details on test conditions:
TEST SYSTEM
no specific information recieved
Reference substance (positive control):
yes
Remarks:
Potassium dichromate

Results and discussion

Effect concentrations
Duration:
48 h
Dose descriptor:
EL50
Effect conc.:
> 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat. (total fraction)
Basis for effect:
mobility
Details on results:

Immobilisation data:
There was no immobilization in daphnids exposed to a 100 mg/L loading rate for a period of 48 hours.

Sub-lethal effects: No sub-lethal effects of exposure were observed throughout the test.

Results with reference substance (positive control):
A positive control study used potassium dichromate as the reference item

The results from the positive control with potassium dichromate were within the normal range for this reference item.

Any other information on results incl. tables


no further information supplied













































    
    
   
    
   
    
    

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Remarks:
The test was considered to be valid given that none of the control daphnids showed immobilization or other signs of disease or stress.
Conclusions:
The acute toxicity of the test item to the freshwater invertebrate Daphnia magna has been investigated and gave a 48-Hour EL50 value of greater than 100 mg/L loading rate. The NOEL rate was 100 mg/L loading rate.