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Light basic magnesium carbonate is a white, tasteless, odourless, amorphous fine powder. Osian Marine Chemicals makes it in Bhavnagar, Gujarat, from sea-bittern and soda ash (see the manufacturing process), in grades for food, pharma, cosmetic, cattle feed, fertilizer, ceramic, glass, leather, paint, paper, printing ink, rubber, sports chalk, pan masala and technical use. Grades are packed in 20 kg or 25 kg laminated HDPE bags with an inner LDPE liner. See the uses of magnesium carbonate and our quality policy, or choose a grade below. We also make an extra light grade and heavy magnesium carbonate.
Bittern of 29° Be is reacted with a soda ash solution in a reaction vessel, which precipitates magnesium carbonate. The precipitate is hydrolysed, filtered, washed and dried, and the dried lumps are pulverised into a white light powder.
Osian recommends dissolving 2 g of the material in dilute sulfuric acid. Genuine material gives a clean, clear solution with no black or brown colouration and no undissolved particles; spurious material shows blackish or brown colouration and undissolved particles.
Light basic magnesium carbonate is used in food, pharma, cosmetics, paper, paint, rubber and latex products. Heavy magnesium carbonate is manufactured for pharmaceutical, paint and ammunition uses. Osian also makes an extra light grade with a bulk density of 80 to 100 g/l.
Light magnesium carbonate grades are packed in 20 kg or 25 kg laminated HDPE bags with an inner LDPE liner, depending on the grade. Heavy magnesium carbonate is packed in 25 kg bags.
Osian Marine Chemicals is based in Bhavnagar, Gujarat, India, with its factory at Village Avania, Taluka Ghogha, and has manufactured and exported magnesium carbonate and other inorganic fine chemicals since 1995.