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EC number: 925-462-9 | CAS number: 1182723-73-4
- 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
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The inhibition of the algal population of Ramatroban butylammonium salt was measured as reduction in growth rate (index r) for a period of 72 hours in a range of concentrations, nominally 6.3, 12.5, 25, 50 and 100 mg/L. An ErC10 of 35.2 mg/L, an ErC50 of >100 mg/L, a NOEC [r] of 25 mg/L and a LOEC [r] of 50 mg/L were determined.
Key value for chemical safety assessment
- EC10 or NOEC for freshwater algae:
- 25 mg/L
Additional information
In order to test acute toxicity to algae of Ramatroban butylammonium salt, Desmodesmus subspicatus was exposed to the test solution of five nominal concentrations (6.3, 12.5, 25, 50 and 100 mg/L) and blank control solution for a period of 72 hours under static conditions. The study was conducted in accordance with Commission Regulation (EC) No 761/2009 amending Regulation No 440/2008, Method C.3 `Freshwater Alga and Cyanobacteria, Growth inhibition test¿ (2009) which is equivalent to OECD Guideline for Testing of Chemicals No. 201 'Alga, Growth Inhibition Test' (2006).
The cell densities were measured at 24 hour intervals. Inhibition of the algal population was measured as reduction in growth rate (index r), relative to control cultures grown under identical conditions.The measured concentrations confirmed that deviation from the nominal concentrations was less than 30 % ( measured concentrations were in the range of 89.9 - 92.4 % of the nominal concentrations.)
The following results were calculated:
ErC 50 (0-72 h): > 100 mg/L
ErC 10 (0-72 h): 35.2 mg/L
NOEC [r] (t¿ 0.05): 25 mg/L
LOEC [r] (t¿ 0.05): 50 mg/L
Comments:As pointed out, in this study the NOEC/LOEC (72 h) determination by statistical methods for growth rate does not appear to be meaningful. For growth rate (72 h) the statistical NOEC and LOEC values are 12.5 mg/L and 25 mg/L respectively. In this cases an effect of 6.3 % inhibition was determined as LOEC value, whereas from the biological point of view the result of only 6.3 % inhibition shows no biological effect. This is corroborated by various algal test guidelines (e.g. DIN 38 412 part 33) which consider only effects > 10 % as biologically relevant. In line with many regulatory-type decisions within the Existing Chemicals Programme of the EU, the EC10 values are generally regarded as surrogates for the NOEC. In the present case for growth rate 10 % effect is effectuated by a concentration of ¿ 25 mg/L, so this value should be taken forward as a NOEC.
This toxicity study is classified as acceptable and satisfies the guideline requirements for the acute algae study.
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