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EC number: 203-788-6 | CAS number: 110-65-6
- 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
72 hour EC50, growth rate, Desdemodesmus subspicatus: 1058 mg/L
72 hour EC20, growth rate, Desdemodesmus subspicatus: 508 mg/L
72 hour EC10, growth rate, Desdemodesmus subspicatus: 346 mg/L
72 hour NOEC, growth rate, Desdemodesmus subspicatus: 125 mg/L
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 1 058 mg/L
- EC10 or NOEC for freshwater algae:
- 125 mg/L
Additional information
The 1,4 -butynediol 72 hour NOEC for growth rate of the freshwater alga (Desdemodesmus subspicatus) provided in a DIN 38412 guideline study is 125 mg/L, the 72 hour EC10 is 346 mg/L, and the 72 hour EC50 is 1058 mg/L (BASF AG 1988). These data are supported by the results of a guideline-equivalent study with Scenedesmus subspicatus which yielded a 72 hour IC50 of >100 mg/L (Tisler, et. al., 2003).
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