Magnesium sulfate, dried, USP grade - 1kg
https://www.anagnostics.com/shop/fm-7w-gk9199-magnesium-sulfate-dried-usp-grade-1kg-472963
https://www.anagnostics.com/web/image/product.template/472963/image_1920?unique=27f5016
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Source of magnesium ions, important for enzymatic activity.
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