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Diss Factsheets
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EC number: 201-075-4 | CAS number: 78-00-2
- 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
Phototransformation in water
Administrative data
- Endpoint:
- phototransformation in water
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Remarks:
- Reliability assessment as per that quoted in IUCLID 4 (2000) data review
Data source
Reference
- Reference Type:
- publication
- Title:
- Decomposition of organolead compounds in aqueous systems
- Author:
- Jarvie, A.W.P., Markall, R.N., Potter, H.R.
- Year:
- 1 981
- Bibliographic source:
- Environmental Research 25, 241-249
Materials and methods
- Study type:
- direct photolysis
Test guideline
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- Aqueous Solutions
After shaking for the appropriate time 50 cm3 of TEL/water solution (suspension) was transferred to a separating funnel, benzene was added and the mixture shaken. The layers were separated, the benzene layer was analyzed for TEL by GLC and the organolead salt in the aqueous layer was determined by a colorimetric technique
Decomposition of Organolead Compounds on Silica
Silica gel was suspended in water before the addition of TEL. Organolead salts were added to the suspension by suitable additions of an aqueous standard solution of the salt. Dilute solutions of TEL were prepared by adding to methanol; appropriate aliquots of this dilute solution were added to the silica. All suspensions were prepared in glass flasks with glass stoppers; mixtures were stored in the dark prior to analysis.
Analysis
The TEL/water suspension was transferred to a separating funnel and benzene was added. The sample was shaken to achieve maximum extraction of TEL. The aqueous suspension of silica was run off into a glass column and the benzene layer was analyzed for TEL by GLC, The organolead salts were eluted from the silica by slowly passing aqueous acetic acid through the column. Successive fractions were collected and neutralized by the addition of aqueous NaOH. The alkyllead content was determined by a colorimetric technique - GLP compliance:
- not specified
Test material
- Reference substance name:
- Tetraethyllead
- EC Number:
- 201-075-4
- EC Name:
- Tetraethyllead
- Cas Number:
- 78-00-2
- Molecular formula:
- C8H20Pb
- IUPAC Name:
- tetraethylplumbane
Constituent 1
Study design
- Light source:
- sunlight
Duration of test at given test condition
- Duration:
- 15
- Initial conc. measured:
- 30 mg/L
Results and discussion
% Degradation
- % Degr.:
- 99
- Sampling time:
- 15 d
- Test condition:
- Direct photolysis
Applicant's summary and conclusion
- Conclusions:
- Jarvie et al found 90% of TEL was degraded after 15 days with a half life of 7.3 days. Once formed the tri and diethyl salts decompose to the unstable monoethyl lead salt and then to inorganic lead.
- Executive summary:
Jarvie et al(A. W. P. Jarvie, R. N. Markell and H. R. Potter, Decomposition of organolead compounds in aqueous systems, Environ. Res.,25,(1981), 241-249) found 90% of TEL was degraded after 15 dayswith a half life of 7.3 days. Once formed the tri and diethyl salts decompose to the unstable monoethyl lead salt and then to inorganic lead.
Breakdown of TEL and the various intermediate organolead compounds to inorganic lead is promoted by sunlight sunlight and in any aqueous system exposed to sunlight decomposition would be rapid. Dark reactions in a pure water system would be slow. Natural water systems contain variety of anions and cations and sediments which would speed up the breakdown of organic lead to inorganic lead.
These conclusions are consistent with those of other such studies for this endpoint
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