Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Based on the results of U.S.E.P.A. QSAR modeling the atmospheric half-life of Vinyl 2-ethylhexanoate was estimated to be 3.9 - 7.8 hours. The hydrolysis half-life of Vinyl 2-ethylhexanoate was determined to be Kb Half-life at pH 8: 2.858 years and Kb Half-life at pH 7: 28.58 years. MacKay Level III modeling suggested that the half-life of Vinyl 2-ethylhexanoate in water was approximately 208 hours. Further MacKay modeling found that if released equally to the environmental compartments, approximately 55.6% of Vinyl 2-ethylhexanoate will transition to soil, 39% to water and 5% to air. If released solely to air, 99.1% of Vinyl 2-ethylhexanoate will remain in the atmosphere. When released to the water compartment, 97% of the Vinyl 2-ethylhexanoate will remain in the water.

Based on the structural similarity some endpoints are read across to vinyl neodecanoate. The results of O.E.C.D. 301 D and 302 C Testing Guideline studies demonstrated that Vinyl neodecanoate was not readily or inherently biodegradable (3 - 17%) under the conditions of the studies, thus concluding that this is a conservative estimate for vinyl 2 -ethylhexanoate. The results of a GLP, O.E..C.D. 305 Testing Guideline Bioconcentration study in rainbow trout with dose-feed modification demonstrated that the Bioconcentration Factor (BCF) ranged from 1100 - 1390. This is an overestimation of the actual BCF for Vinyl Neodecanoate due to low water solubility and would also be a conservative estimate for vinyl 2 -ethyl hexanoate. Furthermore, Vinyl Neodecanoate was rapidly cleared (i.e., >95%) by the fish by day 14 of depuration. Therefore, the calculated BCF values are highly conservative estimates and possibly inappropriate for use in standard environmental fate models.

Based on manufacture and use conditions, little or no Vinyl 2-ethylhexanoate monomer is expected to be released to the environment.