Registration Dossier
Registration Dossier
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 293-917-2 | CAS number: 91648-55-4
- 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
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 5 Nov - 3 Dec 2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Landesamt für Wasserwirtschaft und Gewerbeaufsicht, Kaiser-Friedrich-Straße 7, 55116 Mainz, Germany
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: wastewater treatment plant of Mannheim, Germany, collected on 3 Nov 2014 from the aeration tank of the plant.
- Storage conditions: A suitable aliquot of the activated sludge suspension was sieved by a finely woven mesh with a mesh size about 1 mm. To reduce the content of inorganic carbon in the blank controls the activated sludge was aerated with carbon dioxide free air for about 48 hours at 22 ± 2 °C.
- Preparation of inoculum for exposure: e suspension was washed one time with drinking water. Subsequently the aeration was stopped and the sludge was allowed to settle. After settling the supernatant was discarded and the remaining sludge suspension was filled up
with drinking water
- Concentration of sludge: 6.0 g/L d.w.
- Initial cell/biomass concentration: - Duration of test (contact time):
- 28 d
- Initial conc.:
- 20 mg/L
- Based on:
- other: TOC
- Initial conc.:
- 69 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- TEST CONDITIONS
- Composition of medium: mineral medium compliant with the test guideline OECD 301B
- Test temperature: 19.4 - 22.4°C
- pH: 7.4 ± 0.2
- pH adjusted: yes
- Aeration of dilution water: no
- Suspended solids concentration: 30 mg/L d.w.
TEST SYSTEM
- Culturing apparatus: 2 L incubation bottles filled up to a volume of 1.5 L. The bottles were connected to two serial scrubbing bottles (total volume 250 mL) filled with 100 mL 0.05 mol sodium hydroxide solution for the adsorption of carbon dioxide from biodegradation processes.
- Number of culture flasks/concentration: 2
- Method used to create aerobic conditions: the test vessels were connected with an aeration unit and the bubble aeration with carbon dioxide free air. Air flow: ca. 800 mL/h.
- Measuring equipment: CO2 traps
SAMPLING
Twice a week the Total Inorganic Carbon (TIC) values of the adsorption solutions of the first trap were determined and used for the calculation of the produced carbon dioxide. After each sampling the second trap was moved forward and the new trap with fresh sodium hydroxide solution was placed into the second position. Each trap was analyzed separately.
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes, 2 blank control assays
- Toxicity control: yes, 1 inhibition control assay - Reference substance:
- aniline
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- > 90 - < 100
- Sampling time:
- 28 d
- Details on results:
- The degree of biodegradation after an exposure period of 28 days was 90-100 % CO2/ThCO2 (mean value). Since the test substance is a mixture of structure similar compounds, the 10-day window does not apply.
- Results with reference substance:
- 90% after 28 days
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
Reference
Description of key information
Readily biodegradable according to OECD criteria: 90-100% after 28 days based on CO2 evolution (OECD 301 B)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
A GLP-study assessing ready biodegradation of C16-20AS Na (CAS 91648-55-4) was performed according to OECD 301 B guideline (BASF, 2015). Effluent of the sewage treatment plant handling predominantly domestic sewage was used as inoculum. The initial concentration of the test substance was 69 mg/L (20 mg/L as TOC). Biodegradation of 90-100% was determined after 28 days based on CO2 evolution. Since the test substance is a mixture of similar compounds, the 10-day window does not apply. Based on this result it can be concluded that C16-20AS Na (CAS 91648-55-4) is is readily biodegradable according to OECD criteria.
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.
