I found an old medicine bottle a while back with bisurated magnesia tablets embossed in the glass. I'm quite interested what 'bisurat-ion?' is/was, I've found quite a lot of indigestion tablet adverts online with vibrant descriptions of acid base reactions but not much about the preparation. Can anyone shed any light?
I believe it refers to the old antacid (a.k.a., Bismag) which was magnesium carbonate, sodium bicarbonate. I say old, but I believe bismag may still be available in some pockets of the world, under various brand names.
Yes it is an old antiacid which contains also calcium carbonate. This is the main compound of the mixture (525 mg), the others are in minor amount, magnesium carbonate 71 mg and sodium bicarbonate 64 mg.
Found a small comment in French while googling suggesting its bismuth, which would lower the alkalinity and stabilize the reaction. Thanks for the input :)
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