Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Stability

 

Phototransformation in air

 

If released to air, a vapor pressure of  0.00316mm Hg at 25 deg C (0.00316mm Hg is equivalent to vapour pressure of 0.421Pa ) indicates S-allyl O-pentyl dithiocarbonate will exist solely as a vapor in the atmosphere. Vapor-phase S-allyl O-pentyl dithiocarbonate will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 0.218 days, calculated from its rate constant of 49.0430 E-12 cm3/molecule-sec at 25 deg. S-allyl O-pentyl dithiocarbonate do not contain chromophores that absorb at wavelengths >290 nm and therefore S-allyl O-pentyl dithiocarbonate is not expected to be susceptible to direct photolysis by sunlight.

 Using the AOPWIN QSAR model, the photochemical degradation rate of S-allyl O-pentyl dithiocarbonate in the atmosphere is 49.0430E-12cm3/molecule-sec, with a resultant predicted half live of 2.617Hrs(0.218 Days (12-hr day; 1.5E6 OH/cm3))

 OVERALL OH Rate Constant = 49.0430 E-12 cm3/molecule-sec

  HALF-LIFE =    0.218 Days (12-hr day; 1.5E6 OH/cm3)

  HALF-LIFE =    2.617 Hrs

 

Phototransformation in water

It is not applicable for a compound wich is  slightly soluble or almost insoluble

 Phototransformation in soil

If released to soil, S-allyl O-pentyl dithiocarbonate  is expected to have  high mobility based upon an estimated Koc of 153.4 . Volatilization from moist soil surfaces is not expected to be an important fate process.  Therefore testing for Phototransformation in soils does not need to be performed.  

 

Hydrolysis

 

Hydrolysis is a chemical reaction during which molecules of water (H2O) are split into hydrogen cations (H+, conventionally referred to as protons) and hydroxide anions (OH−) in the process of a chemical mechanism).

 The hydrolysis of the substance was less than 10% over the 5 days, so a definitive test was not performed. Based on these results, S-allyl O-pentyl dithiocarbonate  was hydrolytically stable (half life > 1 year) specified by the OECD Guidelines .

 

Additional information