The discussion revolves around the question of why ferrous sulfate (FeSO4) is not considered a primary standard in analytical chemistry. Participants explore the characteristics that define a primary standard and the stability of FeSO4 in this context.
Participants do not appear to reach a consensus on the classification of FeSO4 and FAS as primary standards, indicating multiple competing views and unresolved questions.
The discussion highlights the importance of specific characteristics that define primary standards, but does not resolve the criteria or the implications of stability and other factors.