Osha vacated pels: magnesium carbonate: 15 mg/m3 twa (total dust); 5 mg/m3 twa (respirable fraction) personal protective equipment eyes: wear appropriate protective eyeglasses or chemical safety goggles as described by osha's eye and face protection regulations in 29 cfr 1910.133 or european standard en166. Apr 24, 2017 · by dan antony. magnesium carbonate (mgco3) is a white solid, readily found in nature as magnesite and which usually occurs in a hydrated form, clustered with water molecules. it has some industrial uses, such as in glass production, but some everyday uses as well. Tradeasia international pte. ltd. 133 cecil street,12-03 keck seng tower, republic of singapore 069535. email : [email protected] tel : +65-62276365 Saudi carbonate company ltd, wishes to thank you for the query you have sent. we acknowledge its receipt and our team will contact you asap. kindly ensure that all your contact details are available and correct (name, company, location, tel, and email).