The slow/fast dynamics of autonomous vector fields is typically the result of disparate timescales that admit the existence of a slow invariant manifold. In the non-autonomous context, slow manifolds are generally referred to as slow integral manifolds. For simplicity, we will use the term "slow manifold" to describe both slow manifolds (the autonomous version) and slow integral manifolds (the non-autonomous version). To establish the presence of slow manifolds, we rescale the mass action equations with respect to the dimensionless variables