Potassium 4-Guaiacolsulfonate 10mg
https://www.manchesterbeacon.org/shop/rw2-trc-p695005-10mg-potassium-4-guaiacolsulfonate-10mg-282527
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This Potassium is guaranteed a 4-Guaiacolsulfonate with the use of 10mg and directly supplied to your lab by Gentaur's warehouse.
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