Supplier: Magnesium oxide specialist: agriculture grade: ag mag85, ag mag90 pharma grade: pg mag99, pg mag98 (equivalent to ip grade) leather tanning : basifier tan 900 (specially for leather industry) industrial grade : hp 90, fg 85 magnesium hydroxide magnesium carbonate [industrial and ip] magnesium sulfate magnesium chloride magnesium sulphate, magnesium chloride