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EC number: 223-453-8 | CAS number: 3900-45-6
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Endpoint summary
Administrative data
Description of key information
The substance 1-(6-methoxy-2-naphthyl)ethan-1-one is not toxic by any of the following route (Oral, inhalation dermal)of exposure.
Key value for chemical safety assessment
Acute toxicity: via oral route
Link to relevant study records
- Endpoint:
- acute toxicity: oral
- 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 doen using the QSAR toolbox version 2.3
- GLP compliance:
- not specified
- Test type:
- standard acute method
- Species:
- other: Rattus norvegicus
- Strain:
- not specified
- Sex:
- male/female
- Route of administration:
- oral: unspecified
- Vehicle:
- not specified
- Sex:
- male/female
- Dose descriptor:
- LD50
- Effect level:
- 2 246.019 mg/kg bw
- Based on:
- test mat.
- Interpretation of results:
- not classified
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- The estimated lethal dose concentration (LD50) of 1-(6-methoxy-2-naphthyl)ethan-1-one for male/female rats using QSAR toolbox version 2.3 is 2246.02 mg/kg bw. Based on this value and and criteria of classifiction mentioned in new CLP regulation it can be concluded that 1-(6-methoxy-2-naphthyl)ethan-1-one is not toxic via oral route.
- Executive summary:
The estimated lethal dose concentration (LD50) of 1-(6-methoxy-2-naphthyl)ethan-1-one for male/female rats using QSAR toolbox version 2.3 is 2246.02 mg/kg bw. Based on this value and and criteria of classifiction mentioned in new CLP regulation it can be concluded that 1-(6-methoxy-2-naphthyl)ethan-1-one is not toxic via oral route.
Reference
The prediction was based on dataset comprised from the following descriptors: LD50
Estimation method: Taking average value from the 5 nearest neighbours
Domain logical expression:Result: In Domain
(("a" and "b" ) and ("c" and "d" ) )
Domain logical expression index: "a"
Similarity boundary:Target: C(C)(=O)c1cc2c(cc(OC)cc2)cc1
Threshold=50%,
Dice(Atom pairs)
Domain logical expression index: "b"
Similarity boundary:Target: C(C)(=O)c1cc2c(cc(OC)cc2)cc1
Threshold=60%,
Dice(Atom pairs)
Domain logical expression index: "c"
Parametric boundary:The target chemical should have a value of log Kow which is >= 2.63
Domain logical expression index: "d"
Parametric boundary:The target chemical should have a value of log Kow which is <= 3.25
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 2 246.02 mg/kg bw
- Quality of whole database:
- K2 data obtained from QSAR estimation
Acute toxicity: via inhalation route
Link to relevant study records
- Endpoint:
- acute toxicity: inhalation
- Data waiving:
- other justification
- Justification for data waiving:
- other:
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
Acute toxicity: via dermal route
Link to relevant study records
- Endpoint:
- acute toxicity: dermal
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Qualifier:
- according to guideline
- Guideline:
- other:
- Principles of method if other than guideline:
- standard acute method
- GLP compliance:
- not specified
- Test type:
- standard acute method
- Species:
- rabbit
- Strain:
- not specified
- Sex:
- not specified
- Type of coverage:
- not specified
- Vehicle:
- not specified
- Control animals:
- not specified
- Sex:
- not specified
- Dose descriptor:
- LD50
- Effect level:
- > 5 000 mg/kg bw
- Based on:
- test mat.
- Interpretation of results:
- not classified
- Remarks:
- Migrated information Criteria used for interpretation of results: EU
- Conclusions:
- Acute toxicity of Methyl 2-naphthyl ether to rat by dermal route studied at dose concentration > 5gm/kg (5000mg/kg).This LD50 value indicate that
Methyl 2-naphthyl ether was non toxic to rabbit by dermal route. - Executive summary:
Acute toxicity of Methyl 2-naphthyl ether to rat by dermal route studied at dose concentration > 5gm/kg (5000mg/kg).This LD50 value indicate that
Methyl 2-naphthyl ether was non toxic to rabbit by dermal route.
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 5 000 mg/kg bw
- Quality of whole database:
- K2 data from relaible journal food and cosmetics toxicology
Additional information
Acute toxicity Oral
Based on studies of target substance CAS NO 3900-45-6 and read across reviewed for acute oral toxicity from reliable sources having Klimisch rating 2 and 4 considering the weight of evidence approach.
The summary of the results are presented below
Sr. No |
End point |
Value |
Species |
Remark |
1 |
LD50 |
2246.019 mg/kgbw |
Rattus norvegicus |
Predicted data of target chemical |
2 |
LD50 |
5000 mg/kgbw |
Rat |
Data from publication for CAS NO 93-04-9 |
3 |
LD50 |
>10000 mg/kgbw |
Rat |
Data from publication CAS NO 119-61-9 |
4 |
LD50 |
2895 mg/kgbw |
mouse |
Data from publication CAS 119-61-9 |
Based on above table, endpoint value was found to vary between 2246.019 to 10000 mg/kg bw which are much higher values. Since the LD50 for target chemical is greater than 2000 mg/kg bw/d which was the criteria for classification towards acute toxicity, it is concluded that the substance 1-(6-methoxy-2-naphthyl) ethan-1-one does not exhibits acute toxicity by the oral route.
Acute toxicity inhalation
For 1-(6-methoxy-2-naphthyl) ethan-1-one, acute toxicity testing by the inhalation route was considered for waiver given that the substance has low vapour pressure of 0.009385895 Pa at 25 degC as well as the particle size distribution indicates that the majority particle size is 600 (57.69%) - 710 (31.19%) micrometer. Thus, exposure by inhalation route is also unlikely for 1-(6-methoxy-2-naphthyl) ethan-1-one given the comparatively larger size of the particulates.
Acute toxicity dermal
Based on studies of readacross across reviewed for acute dermal toxicity from reliable sources having Klimisch rating 2 considering weight of evidence approach
The summary of the results are presented below
Sr. No |
End point |
Value |
Species |
Remark |
1 |
LD50 |
>5000 mg/kgbw |
Rabbit |
Data from publication for CAS NO 93-04-9 |
2 |
LD50 |
3535 mg/kgbw |
Rabbit |
Data from publication for CAS 119-61-9 |
Based on the values summarized in above table, it was found that the endpoint values was found to be in the range of 3535 to 5000 mg/kg bw. Thus based on these values and considering the similarity between the target and readacross and it can be concluded that the substance 1-(6-methoxy-2-naphthyl) ethan-1-one does not exhibits acute toxicity by the dermal route as per CLP criteria.
Justification for selection of acute toxicity – oral endpoint
The estimated lethal dose concentration (LD50) of 1-(6-methoxy-2-naphthyl)ethan-1-one for male/female rats using QSAR toolbox version 2.3 is 2246.02 mg/kg bw. Based on this value and and criteria of classifiction mentioned in new CLP regulation it can be concluded that 1-(6-methoxy-2-naphthyl)ethan-1-one is not toxic via oral route.
Justification for selection of acute toxicity – inhalation endpoint
For 1-(6-methoxy-2-naphthyl) ethan-1-one, acute toxicity testing by the inhalation route was considered for waiver given that the substance has low vapour pressure of 0.009385895 Pa at 25 degC as well as the particle size distribution indicates that the majority particle size is 600 (57.69%) - 710 (31.19%) micrometer. Thus, exposure by inhalation route is also unlikely for 1-(6-methoxy-2-naphthyl) ethan-1-one given the comparatively larger size of the particulates.
Justification for selection of acute toxicity – dermal endpoint
Acute toxicity of Methyl 2-naphthyl ether to rat by dermal route studied at dose concentration > 5gm/kg (5000mg/kg).This LD50 value indicate that
Methyl 2-naphthyl ether was non toxic to rabbit by dermal route
Justification for classification or non-classification
Based on the above studies it can be concluded the substance 1-(6-methoxy-2-naphthyl)ethan-1-one is toxic by any of the following route (Oral, inhalation dermal) of exposure and hence as per CLP criteria it is considered to be non toxic.
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