Dialkyl phosphinic acid

Genetic toxicity: in vitro

Administrative data

Endpoint:

in vitro gene mutation study in bacteria

Remarks:

Type of genotoxicity: gene mutation

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 471 (Bacterial Reverse Mutation Assay)

GLP compliance:

yes

Type of assay:

bacterial reverse mutation assay

Test material

Test material information

Constituent 1

Test material form:

other: liquid

Method

Species / strain

Species / strain 1

Species / strain / cell type:

S. typhimurium TA 1535, TA 1537, TA 98 and TA 100

Additional strain / cell type characteristics:

not applicable

Species / strain 2

Species / strain / cell type:

E. coli WP2 uvr A

Additional strain / cell type characteristics:

not applicable

Metabolic activation:

with and without

Metabolic activation system:

S9 Mix

Test concentrations with justification for top dose:

For both experiments the following concentrations were used:
31.6, 100, 316, 1000, 2500 and 5000 µg/plate.

Vehicle / solvent:

Distilled water

Details on test system and experimental conditions:

In two independent experiments several concentrations of the test item were used. Each assay was conducted with and without metabolic activation. The concentrations, including the controls, were tested in triplicate.
Controls:
neg : distilled water
pos.+S9: sodium azide (TA100, 1535); 4NOPD (TA98, 1537), MMS (E. coli)
pos. -S9: 2-AA

Statistics:

not mandatory

Results and discussion

Test results

Test results 1

Species / strain:

S. typhimurium TA 1535, TA 1537, TA 98 and TA 100

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

no cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Test results 2

Species / strain:

E. coli WP2 uvr A

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

no cytotoxicity

Vehicle controls validity:

valid

Positive controls validity:

valid

Additional information on results:

No precipitation of the test item was observed in any tester strain used in experiment I and II (with and without metabolic activation).
No toxic effects of the test item were noted in any of the five tester strains used up to the highest dose group evaluated with and without metabolic activation in experiment I and II.
No biologically relevant increases in revertant colony numbers of any of the five tester strains were observed following treatment with the test substance at any concentration level, neither in the presence nor absence of metabolic activation in experiment I and II.
The reference mutagens induced a distinct increase of revertant colonies indicating the validity of the experiments.

Remarks on result:

other: all strains/cell types tested

Remarks:

Migrated from field 'Test system'.

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information):
negative

The substance showed no mutagenic effects in the bacterial reverse mutation assay.

Executive summary:

In conclusion it can be stated that during the described mutagenicity test and under the experimental conditions reported, the substance did not cause gene mutations by base pair changes or frameshifts in the genome of the tester strains used. Therefore the substance is considered to be non-mutagenic in this bacterial reverse mutation assay.