Iodine-containing germicidal preparations and method of controlling germicidal activity
US4946673A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Jan 23, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N59/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Iodine-containing germicidal preparations are provided with assured control of the content of equilibrium iodine in aqueous solution to be between 1 and 20 ppm, preferably 2-15 ppm so as to provide predetermined germicidal activity. The invention further comprises the determination of the content of equilibrium iodine in an aqueous iodophor solution by subjecting such solution to several extractions with different amounts of a water immiscible solvent for iodine, determining the concentrations of the equilibrium iodine in each of the amounts of the water immiscible solvent and extrapolating the concentration to a theoretical zero value which is a measure of the equilibrium iodine in the aqueous iodophor solution. The invention further comprises improved germicidal iodophor compositions comprising an iodophor, citric acid and iodate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.