-L. wrote:
> zxcvbob wrote:
>> To keep apple slices from turning brown, dissolve 1/4 tsp Super Iron Out
>> rust stain remover (the same white crystals you use to clean the rust
>> out of your water softener once or twice per year) in a quart of water,
>> and dip the apple slices in the solution as you peel them.
>
> I wouldn't do that, even if the chemical compound is the same. The
> purity is probably NOT the same as the food-grade compound would be,
> and it is probably carrying with it things such as heavy metals. You
> can buy Fruit Fresh at the grocery store which is citric acid (food
> grade) and accomplish the same thing, and ensure your safety as well.
>

The chemical is not the same. This is sodium bisulfite, not ascorbic
acid. I think it *is* food grade because the label says it can be used
on dishes and cookware (including plastic), and in water softeners.

I prefer using Campden tablets because they are designed for treating
grape juice so I *know* they are food grade. I think the Super Iron Out
is food grade also, from what is implied by the label. (maybe I need to
call the company and find out.) And did you notice the dilution rate?

Best regards,
Bob