Hydrogen peroxide and peracetic acid indicators and methods
Assignee3M Innovative Properties Company
InventorDavid M. Read
Life of this patent
Estimating the term…
Abstract
The present invention provides a hydrogen peroxide indicator and a peracetic acid indicator that include a substrate on which is disposed an indicator composition that includes at least one of a select group of colorants and a transition metal salt. As a result of exposure to hydrogen peroxide and/or peracetic acid, the colorants change color, and even become colorless, thereby providing an indication of the presence of hydrogen peroxide and/or peracetic acid.
Claims68
A sterilization indicator comprising a substrate and an indicator composition disposed thereon, wherein the indicator composition comprises:
- at least one salt of a transition metal;
- at least one colorant that changes color when exposed to a sterilant;
- and
- at least one binder resin.
A hydrogen peroxide indicator comprising a substrate and an indicator composition disposed thereon, wherein the indicator composition comprises:
- at least one salt of a transition metal;
- at least one colorant selected from the group of classes of colorants consisting of Methane, Monoazo, Diazo, Triazo, Diazine, Thiazine, Xanthene, Oxazine, and Anthraquinone colorants, and combinations thereof, and/or at least one colorant selected from the group consisting of Victoria green S extra, Basic blue 41, Basic red 15, Acid green AX986, Keystone soap fluoro green, Basic red 14, and combinations thereof;
- and
- at least one binder resin.
A hydrogen peroxide indicator comprising a substrate and an indicator composition disposed thereon, wherein the indicator composition comprises:
- at least one salt of cobalt, copper, chromium, and combinations thereof;
- at least one colorant that changes color when exposed to hydrogen peroxide vapor;
- and
- at least one binder resin.
A peracetic acid indicator comprising a substrate and an indicator composition disposed thereon, wherein the indicator composition comprises:
- at least one salt of a transition metal;
- at least one colorant selected from the group of classes of colorants consisting of Monoazo and Diazo colorants, and combinations thereof, and/or at least one colorant selected from the group consisting of Victoria green S extra, Basic blue 41, Basic red 15, Acid green AX986, Keystone soap fluoro green, Basic red 14, and combinations thereof;
- and
- at least one binder resin.
A peracetic acid indicator comprising a substrate and an indicator composition disposed thereon, wherein the indicator composition comprises:
- at least one salt of copper, cobalt, and combinations thereof;
- at least one colorant that changes color when exposed to peracetic acid;
- and
- at least one binder resin.
A method of monitoring a sterilization process, the method comprising:
- providing an indicator comprising a substrate and an indicator composition comprising:
- at least one salt of a transition metal;
- at least one colorant that changes color when exposed to a sterilant;
- and
- at least one binder resin;
- providing an article to be sterilized;
- and
- exposing the indicator and the article to be sterilized to a sterilant.
A method of monitoring a hydrogen peroxide sterilization process, the method comprising:
- providing a hydrogen peroxide indicator comprising a substrate and an indicator composition comprising:
- at least one salt of a transition metal;
- at least one colorant selected from the group of classes of colorants consisting of Methane, Monoazo, Diazo, Triazo, Diazine, Thiazine, Cyanine, Xanthene, Oxazine, Anthraquinone, Benzodifuranone, Styryl, Phthalocyanine, Quinophthalone, Nitro, and Nitroso colorants, and combinations thereof, and/or at least one colorant selected from the group consisting of Victoria green S extra, Basic blue 41, Basic red 15, Acid green AX986, Keystone soap fluoro green, Basic red 14, and combinations thereof;
- and
- at least one binder resin;
- providing an article to be sterilized;
- and
- exposing the hydrogen peroxide indicator and the article to be sterilized to hydrogen peroxide vapor.
A method of monitoring a hydrogen peroxide sterilization process, the method comprising:
- providing a hydrogen peroxide indicator comprising a substrate and an indicator composition comprising:
- at least one salt of copper, chromium, iron, cobalt, and combinations thereof;
- at least one colorant that changes color when exposed to hydrogen peroxide vapor;
- and
- at least one binder resin;
- providing an article to be sterilized;
- and
- exposing the hydrogen peroxide indicator and the article to be sterilized to hydrogen peroxide vapor.
A method of monitoring a peracetic acid sterilization process, the method comprising:
- providing a peracetic acid indicator comprising a substrate and an indicator composition comprising:
- at least one salt of a transition metal;
- at least one colorant selected from the group of classes of colorants consisting of Monoazo, Diazo, Benzodifuranone, Styryl, Phthalocyanine, Quinophthalone, Nitro, and Nitroso colorants, and combinations thereof, and/or at least one colorant selected from the group consisting of Victoria green S extra, Basic blue 41, Basic red 15, Acid green AX986, Keystone soap fluoro green, Basic red 14, and combinations thereof;
- and
- at least one binder resin;
- providing an article to be sterilized;
- and
- exposing the peracetic acid indicator and the article to be sterilized to liquid peracetic acid.
A method of monitoring a peracetic acid sterilization process, the method comprising:
- providing a peracetic acid indicator comprising a substrate and an indicator composition comprising:
- at least one salt of copper, cobalt, and combinations thereof;
- at least one colorant that changes color when exposed to liquid peracetic acid;
- and
- at least one binder resin;
- providing an article to be sterilized;
- and
- exposing the peracetic acid indicator and the article to be sterilized to liquid peracetic acid.
Dependencies are inferred from the claim text.