C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 9/02 (2006.01) A61K 49/04 (2006.01)
Patent
CA 2710635
This invention relates generally to non-ionic X-ray contrast agents. It further relates to the preparation of iodine chloride, a key reagent in the synthesis of non- ionic X-ray contrast agents such as iodixanol and iohexol. In particular, the iodine chloride is produced in a reaction involving iodine, sodium chlorate, and hydrochloric acid as the starting materials. The instant invention relates to a method of stabilizing aqueous iodine chloride solutions by adding about one to about four molar equivalents of sodium chloride relative to sodium chlorate to an aqueous reaction mixture of sodium chlorate, hydrochloric acid, and iodine.
Fetherstonhaugh & Co.
Ge Healthcare As
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