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EC number: 214-987-2 | CAS number: 1241-94-7
The log Koc value of 4.85 used in the calculation of soil and sediment PNEC's was calculated in EUSES 2.1 using the "predominantly hydrophobics"-(Q)SAR and an input value of 5.87 for log Kow.
The acute and chronic aquatic toxicity of 2EHDPP has been tested with fish, invertebrates and algae. The assessment of the chronic aquatic toxicity of 2EHDPP is further supported by a high quality D. magna life cycle test that was conducted with a structurally analogous compound, isodecyl diphenyl phosphate (IDDPP, CAS RN 29761-21-5). The weight-of-evidence across all the studies is that no aquatic toxicity was found for 2EHDPP at or below the measured water solubility of 0.0506 mg/L at 21 deg.C.
PNEC FOR 2EHDPP
Based on the weight-of-evidence analysis of the available aquatic toxicity dataset (see text above), 2EHDPP is not toxic to aquatic organisms at its water solubility. In addition, a high quality (Klimisch 1) chronic toxicity test with D. magna using a structurally analogous compound (IDDPP) was conducted and also found no toxicity at its water solubility. PNECaquatic cannot be developed using aquatic toxicity studies when no toxicity is found at or below the water solubility. Therefore, based on applicable guidance, the PNECaquatic for 2EHDPP is set at the water solubility of 0.0506 mg/L at 21 deg.C.
Based on the weight-of-evidence analysis of the available acute aquatic toxicity dataset (see text above), 2EHDPP is not acutely toxic to aquatic organisms at its water solubility (0.0506 mg/L at 21 deg.C). Therefore, based on applicable guidance, no acute classification of 2EHDPP is required.
Table 1. Properties and Degradation Data for 2EHDPP (S141, CAS RN 1241-94-7)
1.091 g/mL (25 deg.C)
0.0506 mg/L (21 deg.C)
5.87 (25 deg.C)
OECD 301B – 75% Theoretical CO2 (ThCO2) evolution in 28 d, 10-d window met
Bioconcentration or Bioaccumulation
Factors (BCFor BAF)
53 day uptake and depuration BCF with bluegill sunfish
Heidolph et al. (1982)
1Measured using slow-stir methods (OECD Guidelines 105, 123)
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