8 results about "Ioversol" patented technology

The invention discloses an ioversol injection and a preparation method thereof, and the preparation method comprises the following steps: dissolving ioversol in first water for injection to obtain a first solution; adding a chelating agent into the first solution for dissolving to obtain a second solution; adding a stabilizer into the second solution for dissolving to obtain a third solution; and adding second injection water into the third solution and / or adjusting the pH value to obtain the liquid medicine. According to the method provided by the invention, the total amount of impurities is effectively reduced, and the stability and quality of the injection are improved.

The utility model provides an ioversol purifying device which comprises a supporting frame, a settling tank, a solvent tank and an air compressor are arranged in the supporting frame, the lower end of the settling tank is arranged in a necking mode and is in threaded connection with a storage pipe, an air outlet is formed in one side of the upper portion of the settling tank, an air inlet is formed in the upper end of the solvent tank, and an air outlet is formed in one side of the lower portion of the solvent tank. The input end of the air compressor is connected with an air outlet pipeline, and the output end of the air compressor is connected with an air inlet pipeline. According to the present invention, the solvent is evaporated through the negative pressure form so as to achieve the crystallization precipitation of the ioversol, and the quality of the purified ioversol can be improved at the low temperature.

The invention relates to a method for detecting a residual solvent in ioversol, headspace gas chromatography is adopted for determination, the residual solvent is selected from one or more of ethanol, acetic acid, N, N-dimethylacetamide, benzene and trichloromethane, and the conditions of the headspace gas chromatography are as follows: a chromatographic column is an ultrahigh inert gas chromatographic column; the filler is cyanopropyl-phenyl-polydimethylsiloxane, and the viscosity of the coating is 100-200mPa. S. The headspace equilibrium temperature is 90-110 DEG C, and the headspace equilibrium time is 20-40 minutes; the sampling mode is split sampling, and the split ratio is 1: 1. The method has the advantages of strong specificity, high sensitivity and wide linear range, and meets the requirements of drug quality control.

This invention relates to a method for removing the impurity 5-hydroxyacetamido-N,N'-bis(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-phenylenediamide (compound of formula 1) from the X-ray contrast agent iodofol, with the structural formula: The method utilizes a strongly basic anion exchange resin to selectively adsorb this impurity, achieving excellent results and contributing to the improvement of the purity and yield of iodofol.

The invention discloses an ioversol impurity and a preparation method thereof, the chemical structural formula of an ioversol impurity compound is # imgabs0 #, and the preparation method of the ioversol impurity compound comprises the following three steps: (1) preparation of an intermediate 1, (2) preparation of an intermediate 2 and (3) preparation of the ioversol impurity. Wherein the step (3) comprises the following steps: adding aminoglycerol and triethylamine into a three-necked flask, vacuumizing and filling nitrogen for three times, adding 80mL of DMAC at 0 DEG C under the protection of nitrogen, stirring until the solution is clarified, adding the intermediate 2, slowly heating to 25 DEG C, keeping the temperature, stirring and reacting for 2-4 hours, obtaining an ioversol impurity reaction solution after the reaction is finished, and performing post-treatment to obtain an ioversol impurity finished product. According to the invention, preparation and structure confirmation of the target ioversol impurity compound are completed, a new structure of the ioversol impurity and an efficient impurity synthesis route are developed, the synthesis method which is simple and easy to operate realizes purification of the product, and a large number of impurity reference substances can be obtained.

The invention relates to the field of pharmaceutical chemicals, and in particular to a method for industrially producing ioversol. The method is carried out according to the following reaction equation. The technical scheme of the invention can effectively reduce the generation of impurities and is suitable for industrial production to obtain ioversol with high purity and high yield.

This invention discloses an improved reservoir-type vaginal ring. The drug is loaded as a drug-carrying core by mixing it with silicone rubber, and the core is coated with a controlled-release layer made of pure silicone rubber. The drug-carrying core contains a developing agent and a dispersant. The developing agent includes barium sulfate, titanium dioxide, iodotram, iodofol, iopromide, iodophenylhexamol, and iodophenyl ester. The dispersant includes methyl silicone oil, phenyl silicone oil, vinyl silicone oil, hydrogen-containing silicone oil, and glycerin. This invention combines the advantages of existing extrusion and molding methods, effectively controlling the size and regularity of the drug-carrying core of the reservoir-type vaginal ring, ensuring stable and controllable drug content. It can effectively improve the product deformation problems caused by cutting, external force, and hot-pressing vulcanization processes in existing co-extrusion processes.

The present disclosure relates to a visible ethanol sclerosing agent composition and the use thereof. The composition comprises absolute ethanol, a contrast agent and a co-solvent, wherein the contrast agent is selected from one or more of iopromide, iohexol and ioversol, and the co-solvent contains no water, is miscible with ethanol, and is selected from one or more of DMSO, NMP and DMF. The absolute ethanol is used for strongly sclerosing the blood vessels, the co-solvent is used for increasing the solubility of the contrast agent in the preparation to obtain a good contrast effect, and the contrast agent is used for tracing ethanol under imaging devices. The composition of the present disclosure has a strong sclerosing capacity and can be used for developing and tracing ethanol under imaging devices during an operation, thereby realizing the visualization effect, simplifying the operation, and greatly improving the safety of operation. The sclerosing agent has readily obtainable raw materials, a simple preparation method and easy production, high stability, and convenient storage.