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Two separate short-term toxicity studies (van der Hoeven et al, 1992) are available with terrestrial organisms for polymeric MDI. For the earthworm Eisenia fetida, tested according to OECD 207, a 14d EC50 of 1000 mg/kg soil (d.w.) was obtained. For the plants Avena sativa and Lactuca sativa, tested according to OECD 208, 14d EC50 of 1000 mg/kg soil (d.w.) values were obtained. The values may be considered for the derivation of a PNEC soil.