. . "2019-03-04 17:29:46.0" . "SDN:P07::CF12N367" . "false" . "mass_fraction_of_gaseous_divalent_mercury_in_air"@en . . "SDN:P07::CF12N367" . . . . . "2019-03-04 17:29:46.0" . "\"Mass fraction\" is used in the construction \"mass_fraction_of_X_in_Y\", where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical or biological 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 . "SDN:P07::CF12N367" . "2" . "" . "accepted"@en . "2" . .