Registration Dossier
Registration Dossier
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EC number: 915-589-8 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Stability
Phototransformation in air
No data available (not required for REACH)
Hydrolysis
Not relevant: constituents of the UVCB do not contain hydrolysablegroups or bonds.
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
Alkylation and transalkylation products of biphenyl with propene is considered not readily biodegradable based on a weight of evidence assessment for main constituents of the UVCB substance (including QSAR estimates). Based on the information on screening test level persistence can only be excluded for MIPB, whereas a final conclusion on persitence cannot be drawn for the main constituents DIPB and TIPB.
Biodegradation in simulation tests
Alkylation and transalkylation products of biphenyl with propene is an UVCB substance composed of different constituents. Each constituent is present as a mixture of isomers with unknown constituents. Based on the complex composition in combination with the physico-chemical properties of the substance biodegradation simulation testing is technically not feasible. This was assessed within a feasibility study conducted according to OECD 309 guideline. In a weight of evidence approach, considering study results and QSAR estimates for the main constituents of the UVCB, it was concluded that alkylation and transalkylation products of biphenyl with propene is potentially persistent or very persistent.
Mode of degradation in actual use
No data available (not required for REACH)
Bioaccumulation
Bioaccumulation: aquatic / sediment
BCF = 353 – 11674 L/kg wet-wt (QSARs with EPI Suite v4.11 and VEGA v.1.2.3)
log BCF = 2.55 – 4.07 (QSARs with EPI Suite v4.11 and VEGA v.1.2.3)
Bioaccumulation: terrestrial
No data available (not required for REACH)
Transport and distribution
Adsorption/Desorption
Log Koc values were calculated for the two constituents of the technical product di-IPB/tri-IPB using the program KOCWIN v2.00 included in the estimation tool US EPA EPI Suite vers. 4.11.
For diisopropyl-1,1'-biphenyl (DIPB), a log Koc of 5.0701 (Koc 117,517) was calculated (estimated from MCI). With the same methodology, a log Koc of 5.7765 (Koc 597,723) was calculated for tris(1-methylethyl()-1,1'-biphenyl. To characterise the total of the technical product, log Kow of 5.0701 is selected as diisopropylbiphenyl accounts for ca. 80% of the substance.
Henry's Law constant
Henry's Law Constant was calculated based on values for vapour pressure and water solubility measured with the isomeric mixture of di- and tri-isopropylbiphenyl in combination with the mean molecular weight of the product di-IPB/tri-IPB.
HLC was estimated to be 1028 Pa m³/mol.
Additional information
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