Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Stability
Phototransformation in air
No data available (not required for REACH)
Hydrolysis
Due to its chemical structure, phenol, mono- & distyrenated cannot be hydrolysed. The structure of the molecule does not contain any hydrolysable groups.
Phototransformation in water
No data available (not required for REACH)
Phototransformation in soil
No data available (not required for REACH)
Biodegradation
Biodegradation in water: screening tests
In tests for ready biodegradability using the supporting substances phenol, methylstyrenated (LA 300) (OECD 310, Clarke/Harlan 2010) and cumylphenol (OECD 301 C, NITE 1979), no biodegradation was observed.
Biodegradation in water and sediment: simulation tests
No data is available. A test according to OECD 309 has been waived, because
1. the test substance has a very low water solubility,
2. the low test substance concentration in water required to obtain first order degradation kinetics will result in a very low degradation rate (see below).
Biodegradation in soil
Biodegradation in soil was investigated in a test according to OECD TG 307 (Aerobic and Anaerobic Transformation in Soil) with the test material 2,4,6 -tris(1-phenylethyl)phenol (TSP, tristyrenated phenol) under aerobic conditions. The test material is a component in phenol, mono- & distyrenated and is expected to have the highest persistence of all constituents. The OECD 307 test was prefered over an OECD 309 test (Aerobic Mineralisation in Surface Water - Simulation Biodegradation Test) on reasons of the low water solubilty of the test material and of the low test material concentration required in the test in order to obtain first order degradation kinetics.
DT50 were determined for the parent compound and for degradation products in four different soils at 12 °C and at 20 °C. DT50 of the parent compound ranged from 3.13 to 12.5 days for the tests at 12 °C and from 2.88 to 8.64 days for the tests at 20 °C. For degradation products, the DT 50 were 14.7 to 110 days and 4.78 to 83.0 days, respectively.
Mode of degradation in actual use
No data available (not required for REACH)
Bioaccumulation
Bioaccumulation: aquatic / sediment
The bioaccumulation potential of phenol, mono- & distyrenated can be assessed based on data of two studies. In one study (NITE 1990), the supporting substance cumylphenol (4-(1-methyl-1-phenylethyl)phenol) was tested according to OECD TG 305. The BCF values determined were in the range between 65 and 190. In a second study (Scheerbaum/NOACK 2008), a mixture of distyrenated and tristyrenated phenol (40 and 60% w/w, respectively) was applied in a fish-feeding study (uptake phase 10 days, depuration phase 42 days). A BCF/BMF could not be established for distyrenated phenol, as the test substance concentration in fish decreased below limit of detection already during the second half of the uptake phase (following day 5). For tristyrenated phenol, a growth-corrected, lipid-normalised BMF of 0.355 was determined. Applying different calculation methods, BCF between 6695 and 10.395 /L/kg could be estimated. Results of both studies indicate that the bioaccumulation potential of phenol, mono- & distyrenated is low except for its minor component tristyrenated phenol (ca. 2 %) that is very bioaccumulating.
Bioaccumulation: terrestrial
No data available (not required for REACH)
Transport and distribution
Adsorption/Desorption
Koc values were calculated for the two components of phenol, mono- & distyrenated - mono- and distyrenated phenol. Koc for the mono- and disubstituted phenol were 1324 and 20,735 respectively (Wildschütte/MWC 2016), indicating distribution of phenol, mono- & distyrenated predominately in soil and sediment.
Henry’s Law constant
Using measured values for vapour pressure and water solubility and an average molecular weight of 236, the Henry's Law constant of phenol, mono- & distyrenated was calculated to be 0.0364 Pa m³/mol indicating that evaporation from water will be low.
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