Method for reducing the pyrogen content of or removing pyrogens from substances contaminated therewith

Abstract

A method for removing a pyrogen from a solution of a pyrogen-containing substance such as an amino acid, a nucleic acid base, an antibiotic, a hormone, a vitamin, an enzyme, an antibody or the like comprising contacting the solution with an adsorbent to adsorb the pyrogen, which is characterized in that the adsorbent comprises a water-insoluble carrier and a nitrogen-containing heterocyclic compound of the formula: R--A--X wherein R is a nitrogen-containing heterocyclic group; A is single bond, alkylene or alkenylene; X is hydrogen or a functional group; and the heterocyclic group and alkylene may be optionally substituted by one or more substituents, and the compound being bonded to the carrier directly or through a spacer.

Dependencies are inferred from the claim text.