Water-based sterilization indicator composition
Assignee3M Innovative Properties Company
InventorsKevin D. Landgrebe, Ranjani V. Parthasarathy, Anthony E. Bennett, Peter T. Elliott, Steven S. Kirckof
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Abstract
Water-based formulations comprising an indicating composition dispersed in water are described. The water-based indicating compositions include an organic Bi(III) compound, a sulfur source, and a carbonate salt. Formulations further including a resin and/or an acidic additive are also described.
Claims16
An indicator formulation comprising an indicating composition dispersed in water, wherein the indicating composition comprises
- (a) an organic Bi(III) compound;
- (b) a sulfur source;
- and
- (c) a carbonate salt;
- wherein at least one of the organic Bi(III) compound and the sulfur source has solubility in water at 20° C. of less than 5 grams/100 ml.
An indicator formulation comprising an indicating composition dispersed in water, wherein the indicating composition is prepared by combining in water
- (a) an organic Bi(III) compound;
- (b) a sulfur source;
- and
- (c) a carbonate salt;
- wherein at least one of the organic Bi(III) compound and the sulfur source has solubility in water at 20° C. of less than 5 grams/100 ml.
A method of preparing an indicator formulation comprising combining an organic Bi(III) compound;
- a sulfur source;
- and a carbonate salt in water;
- wherein at least one of the organic Bi(III) compound and the sulfur source has solubility in water at 20° C. of less than 5 grams/100 ml, and reacting the organic Bi(III) compound with the carbonate salt to form bismuth subcarbonate.
Dependencies are inferred from the claim text.