In the PAS reaction this reagent is cancer causing.

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Multiple Choice

In the PAS reaction this reagent is cancer causing.

Explanation:
In PAS staining, periodic acid oxidizes carbohydrates to aldehydes, and Schiff reagent then reacts with those aldehyde groups to produce the magenta color. The reagent that carries cancer risk is Schiff reagent because it contains basic fuchsin, a dye derived from aromatic amines with known carcinogenic concerns in some dye components. Proper handling and disposal are important when using it. The other items play different roles: periodic acid is the oxidizer that forms the aldehydes; mucin is the target that yields aldehyde groups for the reaction; aluminum hematoxylin serves as a nuclear counterstain and is not linked to cancer risk in this context.

In PAS staining, periodic acid oxidizes carbohydrates to aldehydes, and Schiff reagent then reacts with those aldehyde groups to produce the magenta color. The reagent that carries cancer risk is Schiff reagent because it contains basic fuchsin, a dye derived from aromatic amines with known carcinogenic concerns in some dye components. Proper handling and disposal are important when using it. The other items play different roles: periodic acid is the oxidizer that forms the aldehydes; mucin is the target that yields aldehyde groups for the reaction; aluminum hematoxylin serves as a nuclear counterstain and is not linked to cancer risk in this context.

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