Abstract: The present invention provides a composition for absorbing a gaseous unsaturated compound comprising a tetrazine compound incorporated in a polymeric substrate, wherein the tetrazine compound is stable to the presence of moisture. The invention further provides a method of retarding the ripening or senescence of fruit or other plant material using the composition of the present invention. Also provided are methods of removing a gaseous unsaturated compound from an environment and methods of measuring the concentration of, or indicating the presence of, a gaseous unsaturated compound.

Abstract: Epoxy anthraquinonesulfonamide compounds are disclosed having the Formula (I) wherein X1, X2, X3, X4, X5, X6, X7 and X8 are each independently selected from H, OH, NH2, C1-C40 alkyl, C1-C40 alkoxy, C1C40 alkanoyl, C1-C40 alkanol, C1-C40 alkylether, C1-C40 alkylthio, C1-C40 alkylamino, C1-C40 alkanolether, C1-C40 alkylaminoether, C1-C40 alkylsulfonyl, C1-C40 alkyl sulfonanmido, epoxy sulfonamido substituents, and sulfonate substituents, with the proviso that at least one of X1, X2, X3, X4, X5, X6, X7 and X8 is an epoxy sulfonamido substituent, and salts thereof. The compounds and reaction products thereof may be used in oxygen scavenging compositions.