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Diss Factsheets
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EC number: 854-559-8 | CAS number: 2382963-35-9
- 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
Endpoint summary
Administrative data
Description of key information
Ready biodegradability
The ready biodegradability of UB20-LDB (50%) was assessed according to OECD Guideline 301B (Ready Biodegradability: CO2 Evolution Test), EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test) and EPA OPPTS 835.3110 (Ready Biodegradability).
The test item, at a concentration of 9.4 mg carbon/L, was exposed to activated sludge micro-organisms with mineral medium in sealed culture vessels in the dark at temperatures between 21 to 24°C for 35 days. The study was extended from 28 days to 35 days to determine if greater than 60% biodegradation could occur. Due to technical necessity, ammonium salts of UB‑20 was supplied and presented to the test system as the test item UB20-LDB (50%) - a 50:50 solution of ammonium salts of UB-20 in ethylene glycol. For this reason, the test design included an additional solvent control containing ethylene glycol alone. The performance of the ammonium salts of UB‑20 was determined by correcting the CO2 recovery from UB20-LDB (50%) by subtraction of the contemporary CO2 yield in the solvent control. Biodegradation was assessed by the determination of CO2 produced. Control solutions with inoculum and the reference item, sodium benzoate, together with a toxicity control were used for validation purposes.
All validity criteria given in the OECD Test Guidelines were met and the study is considered reliable. The toxicity control attained 65% biodegradation after 14 days, 61% biodegradation after 28 days and 73% biodegradation after 35 days thereby confirming that the test item did not exhibit an inhibitory effect on the sewage treatment micro-organisms used in the test. The reference item (sodium benzoate) attained 89% biodegradation after 14 days with greater than 60% degradation being attained in a 10-day window, thus confirming the suitability of the inoculum and test conditions.
The biodegradation of the ammonium salts of UB‑20 determined by difference (as outlined above) attained 50% after 28 days and 66% biodegradation after 35 days. Since degradation did not reach the 60% threshold within 28 days, the ammonium salts of UB‑20 do not qualify for classification as readily biodegradable. However, exceedance of 60% biodegradation under the conditions of a ready biodegradability test following extension of the incubation to 35 days signifies that the ammonium salts of UB‑20 are not persistent (P) or very persistent (vP) according to EU definitions. The ammonium salts of UB-20 are considered to be inherently biodegradable according to the revised introduction to the OECD guidelines for the testing of Chemicals, Section 3.
Additional information
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