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Short-term toxicity to aquatic invertebrates

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Reference
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:
data from handbook or collection of data
Justification for type of information:
Data is from peer rewied journal.
Qualifier:
according to
Guideline:
other: as mentioned below
Principles of method if other than guideline:
Toxicity of Ammonium molybdate(VI) to Marine Invertebrates was carried out to study the effect and to determine LC 50 values.
GLP compliance:
not specified
Specific details on test material used for the study:
- Name of test material (as cited in study report): ammonium molybdate(VI)
- Molecular formula (if other than submission substance): MoO4.2H4N
- Molecular weight (if other than submission substance): 196.0132 g/mol
- Smiles notation (if other than submission substance): [Mo](=O)(=O)([O-])[O-].[NH4+].[NH4+]
- InChl (if other than submission substance): 1S/Mo.2H3N.4O/h;2*1H3;;;;/q;;;;;2*-1/p+2
- Structural formula attached as image file (if other than submission substance): see Fig. No data available
- Substance type: Inorganic
- Physical state: Solid

Analytical monitoring:
not specified
Vehicle:
yes
Remarks:
water
Test organisms (species):
other: Eupagurus bernhardus
Details on test organisms:
TEST ORGANISM
- Common name: hermit crab
- Source: Gareloch, Dunbartonshire, Solway
Test type:
static
Water media type:
saltwater
Limit test:
no
Total exposure duration:
48 h
Test temperature:
14.5 °C
pH:
soon after preparation of the solution 7.0
end of the exposure period:7.8

soon after preparation of the solution 7.0
end of the exposure period:7.0
Salinity:
32.8
Nominal and measured concentrations:
15.9 or 30 g L-1
Details on test conditions:
No. of organisms per vessel:8
Duration:
48 h
Dose descriptor:
LC50
Effect conc.:
> 191 - < 254 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mortality
Conclusions:
The LC 50 value for Eupagurus bernhardus was found to be ina range of >191 to <254 mg/l for 48 hrs when exposed to Ammonium molybdate(VI). On the basis of value obtained it can be concludede that the Ammonium molybdate(VI) is not toxic to aquatic invertebrates.
Executive summary:

Effect of Ammonium molybdate(VI). on Eupagurus bernharduswas studied at a controlled experiment at 14.5°C showed that it can tolerate a pH of 5.0-6.0 for 24 h without mortality. 32.8 g kg-1is the salinity. 50% mortality was observed that isLD 50 value for Eupagurus bernhardus was found to be in a range of >191 to <254 at 48 hrs.

On the basis of value obtained it can be concludede that the Ammonium molybdate(VI) is not toxic to aquatic invertebrates and can be considered to ne "not classified" under CLP regulation.

Description of key information

The experimental result available for target Ammonium molybdate (VI) from peer reviewed journal Marine pollution Bulletein. 1977, which suggests that effect of Ammonium molybdate (VI) (CAS No. 13106 -76 -8) on Eupargurus bernhardus was studied at a controlled experiment at 14.5 degree C showed that it can be tolerate a pH of 5.0-6.0 for 24 h without mortality. 32.8 g kg-1 is the salinity. 50 % mortality was observed that is LC 50 for Eupargurus bernhardus was found to be >191 - <254 at 48hrs.

On the basis of the value obtained it can be concluded that the Ammonium molybdate (VI) is not toxic to aquatic invertebrates and can be considered "not classified" under CLP regulation.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
191 mg/L

Additional information

Four studies of experimental data from peer reviwed journal for toxicity to aquatic algae endpoint of test chemicalAmmonium molybdate(VI) (CAS No. 13106-76-8)were summarised as follows:

 

The experimental data available for target from peer reviewed journalMarine Pollution Bulletin 1977, theLC 50 value for Eupagurus bernhardus was found to be ina range of >191 to <254 mg/l for 48 hrs when exposed to Ammonium molybdate(VI). On the basis of value obtained it can be concludede that the Ammonium molybdate(VI) is not toxic to aquatic invertebrates.

Similar experimental data available for target from peer reviewed journalMarine Pollution Bulletin 1977, the LD 50 value for Eupagurus bernhardus was found to be >127<254mg/Lfor 24 hrs when exposed to Ammonium molybdate(VI). On the basis of value obtained it can be concluded that the Ammonium molybdate(VI) is not toxic to aquatic invertebrates.

Another experimental data available for target from peer reviewed journalMarine Pollution Bulletin 1977, The LC 50 value for Eupagurus bernhardus was found to be >254mg/Lfor 48 hrs when exposed to Ammonium molybdate(VI). Based on the value it can be concluded that the Ammonium molybdate(VI) is not toxic to aquatic invertebrates.

Last study is also from the samepeer reviewed journalMarine Pollution Bulletin 1977, indicates that the LC 50 value for Carcinus maenas was found to be 1018mg/Lfor 48 hrs when exposed to Ammonium molybdate(VI). On the basis of value obtained it can be concluded that the Ammonium molybdate(VI) is not toxic to aquatic invertebrates.

Thus based on the effect concentrations which is in the range 191 to 1018 mg/L give the conclusion that test substanceAmmonium molybdate(VI) (CAS No. 13106-76-8)was likely to be non toxic to aquatic algae at environmentally relevant concentrations and can be considered to be not classified as per the CLP classification criteria.