. "2009-07-06 15:41:29.0" . "SDN:P07::CF12N259" . "Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. \"Divalent mercury\" means all compounds in which the mercury has two binding sites to other ion(s) in a salt or to other atom(s) in a molecule."@en . "" . "false" . "SDN:P07::CF12N259" . . . "SDN:P07::CF12N259" . "2009-07-06 15:41:29.0" . "mass_concentration_of_gaseous_divalent_mercury_in_air"@en . "accepted"@en . . "1" . . "1" . . .