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EC number: 222-182-2 | CAS number: 3380-34-5
- 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
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Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Triclosan is not readily biodegradable (according to OECD criteria), but inherently biodegradable.
Its metabolite methyl-triclosan (CAS 4640 -01 -1) is also inherently biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
Additional information
The ready biodegradability of Triclosan was tested by several guideline studies. In a study following OECD guideline 301 B the O2 consumption of activated sludge fed with 10 or 20 mg/l test substance was tested. After 28 days a degradation rate of 18 % at a test substance concentration of 20 mg/l was detected. At a test substance concentration of 10 mg/l 37 % of Triclosan were degradaded after 28 days (Ciba-Geigy 1989). Comparable results were derived in a study conducted according to OECD guideline 301 C. Based on O2 consumption a degradation rate of 0 % was determined after 28 days (Ciba-Geigy 1990).
In guideline study on inherent biodegradability according to OECD 302 B a elimination rate of 99.4 % was detected after 14 days of incubation (Ciba-Geigy 1999). Thus the substance is inherently biodegradable. This result is supported by a study on mineralisation of Triclosan in a continuous activated sludge system (CAS). The substance was added continously to activated sludge for 1 ½ month. The degradation rate was determined by analysing the Triclosan concentration after ca. 50 days. The removal rate was 98.2 - 99.3 % (Ciba Specialty Chemicals 1998). In a second CAS test the concentration of Triclosan was constantly increased from 40 µg/l to 200 µg/l. A degradation rate of 75 -88 % was determined by radiochemical measurement (Procter & Gamble 1992). The results are supported by a third CAS test. The test run for 71 days. Based on CO2 evolution a degradation rate of 80 - 98.5 % was recorded (Federle et al. 2002). Under anaerobic conditions less than 10 % degradation were observed (Colgate-Palmolive 1994).
Methyltriclosan (CAS 4640 -01 -1) is regarded as one of the metabolites of triclosan. In an enhanced OECD 301 B study under GLP, methyltriclosan was not readily biodegradable, but proved to be inherently biodegradable (BASF SE; 2012; project no. 22G0533/10G059).
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