what are the chemical indicators

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What are Chemical Indicators?Definition of Chemical Indicator. The chemical indicator is a substance that provides a clear sign or indication by a color change of the presence or absence of a threshold concentration …Types of Indicators. …Artificial Indicators. …Natural Indicators. …Olfactory Indicators. …

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Chemical indicator. Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

According to ANSI/AAMI ST79 Comprehensive guide to steam sterilization and sterility assurance in health care facilities, internal chemical indicators can be a Type 3, Type 4, Type 5, or Type 6. However, Types 5 and 6 are preferred for internal pack monitoring as they provide the user with more information on critical sterilization parameters. 1

See Article History. Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

However, Types 5 and 6 are preferred for internal pack monitoring as they provide the user with more information on critical sterilization parameters. 1 The table below includes the types of chemical indicators, what each type of chemical indicator indicates, and an example of how the chemical indicator may be applied.