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Data was not available for 3a,4,5,6,7,7a-hexahydro-4,7 -methano-1H-indene, therefore available data has been read across from 3a,4,7,7a-tetrahydro-4,7 -methanonoindene (DCPD), supported by QSAR modelling for 3a,4,5,6,7,7a-hexahydro-4,7 -methano-1H-indene

3a,4,7,7a-tetrahydro-4,7 -methanonoindene  is not considered to be readily biodegradable. This substance is also expected to have low potential for bioaccumulation and adsorption to soil and sediment based on its log Kow of 2.78. Structural analysis of the substance molecule indicates that itis not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional groups.

The calculated overall OH rate constant for 3a,4,5,6,7,7a-hexahydro-4,7 -methano-1H-indene is 65.1610 E-12 cm3/molecule-sec.This represents a half-life of 0.164 days (12-hr day; 1.5E6 OH/cm3)