Potassium aluminium silicate amorphous glass fibres

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

Test material information

Constituent 1

Reference substance name:

amporphous glass fibre formed from the melting and fiberisation of predominately slilcon dioxide, calcium oxide, magnesium oxide

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:

amporphous glass fibre formed from the melting and fiberisation of predominately slilcon dioxide, calcium oxide, magnesium oxide

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.