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Diss Factsheets
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EC number: 305-857-7 | CAS number: 95193-46-7
- 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:
- key study
- Study period:
- 28 Aug - 01 Sep 1995
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study with restrictions (no analytical monitoring)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 995
- Report date:
- 1995
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- other: Annex of EU guideline 92/69/EWG, adopted 1992
- Qualifier:
- according to guideline
- Guideline:
- other: VCI concept draft for (acute) aquatic testing of poorly soluble substances, adopted 1994
- Principles of method if other than guideline:
- The VCI concept schedules a maximum of 4 test steps:
(1) Limit test at nominal 100 mg/L without separation of phases
(2) Limit test at nominal 100 mg/L after separation of insoluble components
(3) Testing at saturation level: 3- to 5-fold saturation concentration and separation of insoluble components
(4) Testing of dilutions of the saturated solution prepared in (3) - GLP compliance:
- yes
Test material
- Reference substance name:
- Fatty acids, C16-18 and C18-unsatd., iso-Bu esters
- EC Number:
- 284-868-8
- EC Name:
- Fatty acids, C16-18 and C18-unsatd., iso-Bu esters
- Cas Number:
- 84988-79-4
- IUPAC Name:
- 84988-79-4
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test solutions
- Vehicle:
- no
- Details on test solutions:
- PREPARATION AND APPLICATION OF TEST SOLUTION (especially for difficult test substances)
- Method 1: 100 mg/L after separation of undissolved material:
111 mg test substance were added to 1 L deionised water and continuously stirred for 24 h using a magnetic stirrer. Insoluble parts of the test substance were separated by filtration through a glass fibre filter pre-treated with 1 M NaOH.
- Method 2: 100 mg/L direct weighing without separation of undissolved material:
After weighing, the test substance solution was incubated for 24 h on a shaker.
Test organisms
- Test organisms (species):
- Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
- Details on test organisms:
- TEST ORGANISM
- Source (laboratory, culture collection): Laboratory stock at Henkel KGaA, originally obtained from Universität Göttingen, Institute of Plant Physiology
- Age of inoculum (at test initiation): 3 to 4 days pre-incubation in test medium without test substance
ACCLIMATION
- Culturing media and conditions (same as test or not): same
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 72 h
Test conditions
- Hardness:
- no data
- Test temperature:
- 23 °C
- pH:
- 6.9 - 7.0 at test start
6.8 - 7.2 at test end - Dissolved oxygen:
- no data
- Nominal and measured concentrations:
- Nominal: 0 and 100 mg/L, with and without separation of insoluble test substance components
- Details on test conditions:
- TEST SYSTEM
- Test vessel: Erlenmeyer flasks
- Size, fill volume: 300 mL, 100 mL
- Initial cells density: 10,000 cells/mL
- Control end cells density: 220,000 cells/mL
- No. of vessels per concentration (replicates): 3
- No. of vessels per control (replicates): 3
GROWTH MEDIUM
- Standard medium used: mineral salt medium following DIN 38412/9
- Detailed composition if non-standard medium was used: no details given
OTHER TEST CONDITIONS
- Sterile test conditions: Bacterial growth was observed in the test series with direct weighing of the test substance.
- Photoperiod: continuous light
- Light intensity and quality: max. 300 lux with daylight spectrum
- Shaking: 120 rpm
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
- Determination of cell concentrations: counting chamber
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 72 h
- Dose descriptor:
- EC50
- Effect conc.:
- < 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Remarks on result:
- other: without filtration
- Duration:
- 72 h
- Dose descriptor:
- EL50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Remarks:
- WAF
- Basis for effect:
- biomass
- Remarks on result:
- other: with filtration
- Details on results:
- - Exponential growth in the control (for algal test): yes
- Other: In the test series with direct weighing of the test substance, turbidity of the medium occured due to growth of bacteria
- Effect concentrations exceeded solubility of substance in test medium in part 2 of the study.
Any other information on results incl. tables
Part 1 of the study (without separation of undissolved test substance): Average growth inhibition of 93% (AUC method).
Part 2 of the study (after separation of undissolved test substance): No negative effects at the level of water solubility (< 0.025 mg/L).
Based on these results it can be assumed that the effects occurring in the presence of undissolved test substance components are due to the physical effects of undissolved fractions rather than to systemic toxicity.
Table 1: Cell concentrations after 24, 48 and 72 h of exposure to the test substance
Test Concentration (mg/L) |
Cell Concentration (cells/mL) |
||
24 h |
48 h |
72 h |
|
0 |
3.0E04 |
9.0E04 |
2.2E05 |
100 without separation |
0 |
2.3E04 |
3.3E04 |
100 after separation |
2.0E04 |
1.5E05 |
3.6E05 |
Applicant's summary and conclusion
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.