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EC number: 292-636-2 | CAS number: 90641-12-6 The residue remaining from the distillation of recovered naphtha. Composed primarily of naphthalene and condensation products of indene and styrene.
- 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
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Basic data given; comparable to guideline study; test was performed by an laboratory with an high reputation for delivery of solid data.
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- Biodegradation and Bioconcentration of Existing Chemical Substances under the Chemical Substances Control Law - Naphthalene
- Author:
- NITE National Institute of Technology and Evaluation, Japan
- Year:
- 1 979
- Bibliographic source:
- http://www.safe.nite.go.jp/data/hazkizon/pk_e_kizon_disp.html?k_no=0058
- Report date:
- 1979
- Reference Type:
- publication
- Title:
- Biodegradation and bioaccumulation data of existing chemicals based on the CSCL Japan
- Author:
- Chemical Inspection & Testing Institute (CITI), Japan
- Year:
- 1 992
- Bibliographic source:
- published by Japan Chemical Industry Ecology-Toxicology & Information Center, October 1992
- Report date:
- 1992
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 302 C (Inherent Biodegradability: Modified MITI Test (II))
- Principles of method if other than guideline:
- MITI-II test performed under the auspices of the Japanese Chemical Inspection & Testing Institute (CITI); method is similar or according to later OECD TG 302C (MITI II Test)
- GLP compliance:
- no
Test material
- Reference substance name:
- Naphthalene
- EC Number:
- 202-049-5
- EC Name:
- Naphthalene
- Cas Number:
- 91-20-3
- Molecular formula:
- C10H8
- IUPAC Name:
- naphthalene
- Details on test material:
- - Name of test material (as cited in study report): naphthalene
- no further information on test material
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: sludge was sampled and prepared according to Japanes standard procedure (samples taken from 10 different sites: 3 city sewage plants, 1 industrial sewage plant, 3 rivers and 3 bays; sampling 4 times every year)
- Laboratory culture: sludge was kept in culture for 3 month
- Method of cultivation: Sludge was cultured at 25 ± 2°C. On every day about 30 min after cessation of aeration, 1/3 of the supernatant was removed and replaced by an equal amount of dechlorinated water. Aeration was continued and synthetic sewage (5% w/v of glucose, peptone and monopotassium phosphate, pH adjusted to 7 ± 1 with sodium hydroxide) was added.
- Storage conditions: at 25 ± 2°C
- Storage length: 3 month
- Preparation of inoculum for exposure: measurement of concentration of suspended solid according to JIS K 0102 method 14.1 - Duration of test (contact time):
- 4 wk
Initial test substance concentration
- Initial conc.:
- 30 other: ppm
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- TEST CONDITIONS
- Composition of medium: 3 mL of solution A, B, and C as described in JIS K 0102 method 21 were made up to 1000 mL with purified water and the pH was adjusted to 7.0
- Test temperature: 25 ± 2
- pH: 7
- pH adjusted: if required
- Aeration of dilution water: no data
- Suspended solids concentration: 100 ppm
- Continuous darkness: yes
TEST SYSTEM
- Culturing apparatus: Close system oxygen consumption measuring apparatus; 300 mL glas vessels
- Number of culture flasks/concentration: 3 for test substance, 2 for test substance blanks, 1 for abiotic control, 1 for positive control
- Method used to create aerobic conditions: production of O2 as O2 was consumed.
- Measuring equipment: Coulometer Ohkura Electric Co., Ltd.
- Test performed in closed system: yes
- Details of trap for CO2 and volatile organics if used: soda lime No. 1 (extra pure reagent, Wako Pure Chemical Industries, Ltd.)
- Other: test solution was stirred by a magnetic stirrer
SAMPLING
- Sampling frequency: continuous registration of O2 consumption; test substance determination at the beginning and at the end of the test
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes
- Abiotic control: yes
- Toxicity control: no
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- 2
- Sampling time:
- 4 wk
- Parameter:
- % degradation (test mat. analysis)
- Value:
- 0
- Sampling time:
- 4 wk
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Remarks:
- : criteria as required by MITI-II method
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- In a MITI-II test for inherent biodegradability similar to OECD TG 302C performed under the Japanese Chemical Inspection & Testing Institute, no biodegradation of the test substance naphtalene was observed.
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