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EC number: 247-557-8 | CAS number: 26264-06-2
- 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
Phototransformation in water
Administrative data
Link to relevant study record(s)
- Endpoint:
- phototransformation in water
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Justification for type of information:
- Sodium dodecylbenzenesulfonate (CAS# 25155-30-0 , EC Number; 246-680-4 ) is a very close analogue of Calcium dodecylbenzenesulfonate (CAS No 26264-06-2, EC Number; 247-557-8) ) and read-across is valid.
- Reason / purpose for cross-reference:
- read-across source
- Study type:
- indirect photolysis
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- A study was conducted to determine the photodegradation of LAS in aqueous TiO2 dispersions. Experiments were carried out with 25 mL solutions containing LAS surfactant with TiO2. Some experiments used open vessels (37 mL Pyrex glass reaction vessels) under aerobic conditions. Others used vessels sealed with a rubber septum, the solution purged with argon and a fixed volume of oxygen injected. Spectrophotometric analysis was performed at regular intervals.
- GLP compliance:
- not specified
- Radiolabelling:
- not specified
- Light source:
- Xenon lamp
- Light spectrum: wavelength in nm:
- > 330
- Details on light source:
- Xe lamp (450W)
- Type of sensitiser:
- other: aqueous solution with TiO2 particles
- Concentration of sensitiser:
- 50 mg/L
- Details on test conditions:
- - Sensitizer : TiO2 suspension- Temperature : 25 deg C; during photolysis the solution temperature 35-40 deg C- Con. of subst : 50 ppm
- Preliminary study:
- Dodecylbenzene sulfonate is quickly decomposed when an aqueous solution of this compound is irradiated with light (λ> 330 nm) in the presence of TiO2 particles. The reaction proceeds in two steps: the decomposition of the aromatic ring occurs rapidly and is followed by oxidation of the alkyl chain. The adsorption of the surfactant on the surface of TiO2 makes the first step particularly effective even in the absence of catalysts such as noble metals. The application of this process in the detoxification of polluted waters is discussed
- Details on results:
- After 30 minutes the DBS have been decomposed and removal of the DBS absorption is complete after 2 hours of the light exposure.Rapid photodegradation (within 2 hours of light exposure) .Rapid (<1-2 hours) decomposition
- Validity criteria fulfilled:
- yes
- Conclusions:
- Rapid (<1-2 hours) decomposition. Dodecylbenzene sulfonate is rapidly photodegraded in aqueous aerated TiO2 suspensions. The reaction involves fast decomposition of the aromatic ring followed by slower oxidation of the aliphatic chain.
- Executive summary:
Dodecylbenzene sulfonate is quickly decomposed when an aqueous solution of this compound is irradiated with light (λ> 330 nm) in the presence of TiO2 particles. The reaction proceeds in two steps: the decomposition of the aromatic ring occurs rapidly and is followed by oxidation of the alkyl chain. The adsorption of the surfactant on the surface of TiO2 makes the first step particularly effective even in the absence of catalysts such as noble metals. The application of this process in the detoxification of polluted waters is discussed
Reference
Description of key information
After 30 minutes the Sodium dodecylbenzenesulfonate (DBS) have been decomposed and removal of the DBS absorption is complete after 2 hours of the light exposure.Rapid photodegradation (within 2 hours of light exposure) .Sodium dodecylbenzenesulfonate (CAS# 25155-30-0 , EC Number; 246-680-4 ) is a very close analogue of Calcium dodecylbenzenesulfonate (CAS No 26264-06-2, EC Number; 247-557-8) ) and read-across is valid.
Dodecylbenzene sulfonate is rapidly photodegraded in aqueous aerated TiO2 suspensions. The reaction involves fast decomposition of the aromatic ring followed by slower oxidation of the aliphatic chain.
Key value for chemical safety assessment
- Half-life in water:
- 2 h
Additional information
Data are available on the photodegradation of Na-C12 LAS in water.
Sodium dodecylbenzenesulfonate (CAS# 25155-30-0 , EC Number; 246-680-4 ) is a very close analogue of Calcium dodecylbenzenesulfonate (CAS No 26264-06-2, EC Number; 247-557-8) ) and read-across is valid.
The results are as follows:
Table Photodegradations of Na-C12 LAS
Light source |
Light spectrum |
Test material |
Result |
References |
Xe lamp |
>330 nm |
Sodium dodecylbenzenesulfonate |
Rapid (<1-2 hours) decomposition |
Hidakaet al., 1985 |
Mercury vapor lamp |
200-350 nm |
Sodium dodecylbenzenesulfonate |
>95% photolytic degradation after 20 minutes |
Matsuura and Smith, 1970 |
Mercury lamp |
400-580 nm |
Sodium dodecylbenzenesulfonate |
The presence of humic substances delayed the photodegradation |
Hermannet al., 1997 |
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