Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

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Additional information

Due to the tertiary (neo) carbon bonding and branched alkyl chain structure, vinyl neodecanoate is anticipated to be strongly resistant to UV degradation and hydrolysis under environmantal conditions. Based on the results of U.S.E.P.A. QSAR modeling the atmosphiric half-life of Vinyl Neodecanoate was estimated to be 3.9 - 6.5 days. The hydrolysis half-life of Vinyl Neodecanoate was determined to be Kb Half-life at pH 8: 27.3 days and Kb Half-life at pH 7: 273 days. MacKay Level III modeling suggested that the half-life of Vinyl Neodecanoate in water was approximately 900 days. Further MacKay modeling found that if released equally to the environmental compartments, approximately 78% of Vinyl Neodecanoate will transition to soil. If released solely to air, 94.5% of Vinyl Neodecanoate will remain in the atmosphere. When released to the water compartment, 35% of the Vinyl Neodecanaote wiill remain in the water and 64.3% will migrate to the sediment.

The results of O.E.C.D. 301 D and 302 C Testing Guideline studies demonstrated that Vinyl Neodecanoate was not readly or inherently biodegradable (3 - 17%) under the conditions of the studies. 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. Furthermore, Vinyl Neodecanoate was rapidly cleared (i.e., >95%) by the fish by day 14 of depuration. The Growth-corrected half-life of the test substance was 2.6 days. 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 Neodecanoate monomer is expected to be released to the environment.