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By Patty 01/18/2011
I believe it is pure ascorbic acid (vitamin C). I use powdered lemon-aid in my dishwasher now instead of Lemi Shine because it works the same and is cheaper. I think Lemi Shine is stronger than the lemon-aid so I use it when I have build up around my sink faucets or in the toilet bowl. It's great stuff.
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