Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Phototransformation in air

The atmospheric half-life versus reaction with the hydroxyl radical (OH) is 2.3 days. The reaction with hydroxyl radical is the major sink of vinyl chloride. The atmospheric half-life versus reaction with ozone is 45 days. The reaction with ozone is a minor sink. The atmospheric half-life versus reaction with the nitrate radical is 155 days, which is a negligible sink. Direct photolysis negligible in the atmosphere. The reaction with the chlorine atom is negligible in the atmosphere, except possibly in the marine boundary layer. The reaction with the ground-state oxygen atom is negligible in the atmosphere. Overall the atmospheric half-life is 2.3 days. The main primary atmospheric degradation product from reaction with ozone is formyl chloride. Other products are formaldehyde, HCl, CO, CO2, formic acid, etc.

Hydrolysis

Hydrolysis is not expected to be a relevant dissipation route for vinyl chloride in water. Due to the fact that vinyl chloride is a gas, rapid volatilisation is expected and no significant concentrations are present in the fresh water and seawater compartment. This is supported by exposure assessment with EUSES. A regional PEC in fresh surface water of 4.18E-06 mg/L and a regional PEC in seawater of 3.44E-07 mg/L were calculated. The maximal local PEC value that was calculated for fresh water was 3.66E-02 mg/L (for S-PVC production). The maximum local PEC value that was calculated for seawater was 3.66E-03 mg/L (for S-PVC production). Since these concentrations are very low, hydrolysis is not considered to be relevant.