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Diss Factsheets
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EC number: 932-286-6 | CAS number: -
- 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
Toxicity to aquatic algae and cyanobacteria
Administrative data
- Endpoint:
- toxicity to aquatic algae and cyanobacteria
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study with acceptable restrictions.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 990
- Report date:
- 1990
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: DIN-Norm 38412-L9
- Principles of method if other than guideline:
- DIN 38 412, Teil 9: Testverfahren mit Wasserorganismen (Gruppe L). Bestimmung der Wirkung von Wasserinhaltsstoffen auf Grünalgen (Scenedesmus-Zellvermehrungshemmtest) (German standard) Deutsches Institut für Normung e.V., Berlin (Weissdruck Mai 1989).
Comparable to OECD TG 201, adopted 1984 - GLP compliance:
- yes
- Remarks:
- The study was conducted under GLP (OECD) with exeption of the determination of the stability, homogeneity and concentration of the test material in the test medium.
Test material
- Reference substance name:
- 2,2,4,6,6-pentamethylheptane-4-thiol
- EC Number:
- 296-714-7
- EC Name:
- 2,2,4,6,6-pentamethylheptane-4-thiol
- Cas Number:
- 93002-38-1
- Molecular formula:
- C12H26S
- IUPAC Name:
- 2,2,4,6,6-pentamethylheptane-4-thiol
- Details on test material:
- - Name of test material (as cited in study report): Tert. Dodecylmercaptan
- CAS No. as cited in study report: 25103-58-6 (tert. dodecanethiol), but the test material was material as defined in section 1 (CAS 93002-38-1). Therefore the new CAS number 93002-38 was assigned.
- Batch No.: 7131486
- Analytical purity: 79.4%
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test solutions
- Vehicle:
- no
- Details on test solutions:
- - Evidence of undissolved material: oily surface film, material precipitated to wall of the test vessels
- Preparation of test solutions with running magnetic stirrer (stock solution)
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Study design
- Test type:
- static
- Water media type:
- freshwater
- Total exposure duration:
- 72 h
Test conditions
- Test temperature:
- 20.5-22.5 °C
- Nominal and measured concentrations:
- nominal: 100 mg/L, 32 mg/L, 10 mg/l, 3,2 mg/L, 1 mg/L, 0.32 mg/L, 0.1 mg/L
- Details on test conditions:
- TEST SYSTEM
- Test vessel: Erlenmeyerkolben (300 mL)
- Testvolume: 100 mL
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
- Determination of cell concentrations: [electronic particle counter]
Thrombozytenzähler Sysmex F 300
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- 81 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Details on results:
- Validity criteria are fulfilled: 16 fold increase in cell number of the control throughout the test duration, exponential growth
Applicant's summary and conclusion
- Executive summary:
Testing adverse effects of the test item towards algae, no significant effects were observed up to the limit of the water solubility (Bayer AG, 1990).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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