Abstract: This invention relates to reactive groups immobilized on inorganic substrates such as derivatized glass, silica, ceramics, or metals. The immobilized reactive groups can be used to inactivate or remove nitrosating agents in liquids, thereby reducing the formation of potentially carcinogenic nitrosamines and nitroso compounds in liquids that come into contact with humans. The use of inorganic substrates provides several advantages, which include extending the range and adaptability of the method of this invention and allowing its use in liquids that would dissolve or react with organic polymers.

Abstract: This invention relates to polymers that can be used to remove or sequester nitrosating agents such as nitrous acid, nitrous esters or thio-esters, nitrous anhydrides, nitrosyl halides, metal nitrosyls, inorganic metal nitrite complexes or similar nitrosating agents from fluid mixtures. This prevents the nitrosating agents from reacting with amines or other nitrogen-containing compound to form nitrosamines or other N-nitroso compounds, which are carcinogenic, in products such as cosmetics and other personal care items, shampoo, pesticides, rubber and rubber chemicals, commercial chemicals and prodcuts formulated from them, and metalworking fluids.The reactive groups of this invention can be classified into three categories: (1) unsaturated electron-rich aromatic molecules such as pyrrole; (2) reducing agents such as hydroquinone; and (3) amine groups and other amino compounds.The incorporation of reactive groups into polymeric molecules as described herein provides several advantages.