Registration Dossier
Registration Dossier
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EC number: 241-774-1 | CAS number: 17796-82-6
Endpoint summary
Administrative data
Description of key information
Additional information
The hydrolysis half-life of 23.3 hours at pH=7 and 25°C has been reported forN-(cyclohexylthio)phthalimide and the primary hydrolysis product was identified as the carboxylic acid (ring-opened half-acid) derivative of the parent compound (Monsanto ABC-32456, 1986).Laboratory results have been confirmed by field tests on manufacturing plant effluent.
According to peer reviewed data from Hazardous Substances Databank (number7259) N-(cyclohexylthio)phthalimideis not expected to be susceptible to direct photolysis by sunlight, since a related compound, 1H-isoindole-1,3(2H)-dione, does not absorb light with wavelengths >290 nm (Lide, Milne, 1994).
The calculated half-life of CTP in air due to indirect photodegradation is 2.8 hours, considering a reaction constant of 45.7076 *10-12 cm3/molecule1.s1and a daily mean (24-h) OH-radicals concentration of 156 000 molecule/cm3(US EPA, 2004). The recalculated half-life of CTP in air using the latest version ofAopWin v1.92 2.808 Hrs with OH Rate Constant = 45.7076 E-12cm3/molecule-sec (Ekotoxikologické centrum Bratislava, s.r.o., 2010a).
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