Mallory PTAH solution is ripened for immediate use by which agent?

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Multiple Choice

Mallory PTAH solution is ripened for immediate use by which agent?

Explanation:
Ripening Mallory PTAH means oxidizing the stain so the hematoxylin-phosphotungstate complex becomes active and can develop its characteristic blue color in tissue. Potassium permanganate is the oxidizing agent used for this step; a small amount is added and the solution stands to develop the color, after which it’s ready for immediate use. Without this oxidation, the stain would be underdeveloped. The other agents listed do not serve this ripening purpose in the standard Mallory PTAH protocol.

Ripening Mallory PTAH means oxidizing the stain so the hematoxylin-phosphotungstate complex becomes active and can develop its characteristic blue color in tissue. Potassium permanganate is the oxidizing agent used for this step; a small amount is added and the solution stands to develop the color, after which it’s ready for immediate use. Without this oxidation, the stain would be underdeveloped. The other agents listed do not serve this ripening purpose in the standard Mallory PTAH protocol.

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