1 results about "Fluorescein sodium" patented technology

The present application belongs to the field of chemical purification, and particularly relates to a method for removing residual solvents in fluorescein sodium, and more particularly, the present application provides a method for removing residual solvents in fluorescein sodium by adding water to the fluorescein sodium containing residual solvents or using moisture in the environment to replace the residual solvents in the fluorescein sodium, and then drying the fluorescein sodium to remove water. The method provided by the present application is simple to operate, easy to realize industrialization, low in cost, green and environmentally friendly, convenient for quality control in the process of drug preparation, and meets the requirements in regulations.