The development of a reddish purple color when few drops of the Schiff reagent are added to 10 mL of 37-40% formaldehyde indicates which of the following?
A)Schiff reagent is still good and usable
B)Schiff reagent is not effective
C)Schiff reagent should be discarded
D)None of the above

Question

Quizplus · Accepted Answer

Schiff reagent is still good and usable
The development of a reddish purple color when few drops of Schiff reagent are added to 10 mL of 37-40% formaldehyde indicates that Schiff reagent is still good and usable. When it develops a color such as a deep blue-purple color, then it means that the solution is breaking down and is not good for staining already. All the other options are incorrect and inaccurate.

The Development of a Reddish Purple Color When Few Drops