The statement 'Sodium iodate and ammonium aluminum sulfate are used to make Weigert's hematoxylin' is:

• A. True
• B. False
• C. Not sure
• D. Not applicable

Answer: (B)

Sodium iodate and ammonium aluminum sulfate are not what define Weigert's hematoxylin. This stain is an iron-hematoxylin method, forming the nuclear stain through a complex with ferric iron mordant. The mordant component is typically ferric ammonium sulfate (iron-based), not aluminum-based mordants. Sodium iodate may be used as an oxidizer or in other hematoxylin variants, but it is not a core reagent in Weigert's hematoxylin, and aluminum mordants are not used in this formulation. So the statement is not correct because the preparation relies on an iron mordant rather than sodium iodate and aluminum sulfate.