Registration Dossier

Administrative data

Key value for chemical safety assessment

Genetic toxicity in vitro

Description of key information

The substance 2-(2-chloroethoxy)ethanol was found to be non mutagenic.

Link to relevant study records
Reference
Endpoint:
in vitro gene mutation study in bacteria
Remarks:
Type of genotoxicity: gene mutation
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Qualifier:
according to guideline
Guideline:
other: estimated data
Principles of method if other than guideline:
Prediction is done using QSAR Toolbox version 2.3.
GLP compliance:
no
Type of assay:
bacterial reverse mutation assay
Species / strain / cell type:
S. typhimurium TA 100
Additional strain / cell type characteristics:
not specified
Metabolic activation:
without
Metabolic activation system:
S9
Species / strain:
S. typhimurium TA 100
Metabolic activation:
without
Genotoxicity:
negative
Cytotoxicity / choice of top concentrations:
not specified
Vehicle controls validity:
not specified
Untreated negative controls validity:
not specified
Positive controls validity:
not specified
Remarks on result:
other: all strains/cell types tested
Remarks:
Migrated from field 'Test system'.





The prediction was based on dataset comprised from the following descriptors: "Gene mutation"
Estimation method: Taking highest mode value from the 5 nearest neighbours
Domain logical expression:Result: In Domain

((("a" and "b" ) and ("c" and ( not "d") ) ) and ("e" and "f" and "g" and "h" ) )

Domain logical expression index: "a"

Similarity boundary:Target: C(Cl)COCCO
Threshold=50%,
Dice(Atom pairs)

Domain logical expression index: "b"

Similarity boundary:Target: C(Cl)COCCO
Threshold=60%,
Dice(Atom pairs)

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as No alert found by Protein binding by OASIS

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Acid anhydride OR Active cyclic agents OR Aldehydes OR alpha,beta-carbonyl compounds with polarized double bonds OR alpha-activated haloalkanes OR alpha-haloalkanes OR alpha-ketoesters OR Diketones OR Epoxides, Aziridines and Sulfuranes OR Ketones OR MA: Addition to Carbon-hetero double/triple bond OR MA: Direct acylation involving a leaving group OR MA: Michael addition on conjugated systems with electron withdrawing group OR MA: Nucleophilic cycloaddition to diketones OR MA: Nucleophilic substitution at sp3 Carbon atom OR MA: Ring opening acylation OR MA: Ring opening SN2 reaction OR MA: Schiff base formation with carbonyl compounds OR Mechanistic Domain: Acylation OR Mechanistic Domain: Michael addition OR Mechanistic domain: Nucleophilic addition OR Mechanistic Domain: Schiff base formation OR Mechanistic Domain: SN2 by Protein binding by OASIS

Domain logical expression index: "e"

Parametric boundary:The target chemical should have a value of log Kow which is >= -0.386

Domain logical expression index: "f"

Parametric boundary:The target chemical should have a value of log Kow which is <= 0.00239

Domain logical expression index: "g"

Parametric boundary:The target chemical should have a value of Water Solubility which is >= 2.74E005 mg/L

Domain logical expression index: "h"

Parametric boundary:The target chemical should have a value of Water Solubility which is <= 4.64E005 mg/L

Conclusions:
Interpretation of results (migrated information):
negative without metabolic activation

Based on the prediction for in-vitro bacterial reverse mutation assay (e.g. Ames test) on S. typhimurium TA 100 without S9 metabolic activation it was estimated that 2-(2-chloroethoxy)ethanol was non mutagenic.
Executive summary:

Based on the prediction for in-vitro bacterial reverse mutation assay (e.g. Ames test) on S. typhimurium TA 100 without S9 metabolic activation it was estimated that 2-(2-chloroethoxy)ethanol was non mutagenic.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (negative)

Additional information

Additional information from genetic toxicity in vitro:

Ames Test :

Based on the prediction for in-vitro bacterial reverse mutation assay (e.g. Ames test) on S. typhimurium TA 100 without S9 metabolic activation it was estimated that 2-(2-chloroethoxy)ethanol was non mutagenic.

Chromosome aberration :

Based on the prediction for in-vitro mammalian chromosome aberration test on Chinese hamster Lung (CHL) without S9 metabolic activation it was estimated that 2-(2-chloroethoxy)ethanol does not exhibit positive chromosomal effect.

Justification for selection of genetic toxicity endpoint

Based on the prediction for in-vitro bacterial reverse mutation assay (e.g. Ames test) on S. typhimurium TA 100 without S9 metabolic activation it was estimated that 2-(2-chloroethoxy)ethanol was non mutagenic. Also Based on the prediction for in-vitro mammalian chromosome aberration test on Chinese hamster Lung (CHL) without S9 metabolic activation it was estimated that 2-(2-chloroethoxy)ethanol does not exhibit positive chromosomal effect.

Justification for classification or non-classification

2-(2-chloroethoxy)ethanol shows negative activity as is the case for chromosome abberation for the same substance.