Magnesium trisilicate is an ingredient found in many antacids. It neutralizes stomach acid to relieve conditions such as heartburn, ulcers, indigestion, and gastroesophageal reflux disorder, or GERD. Antacid pills such as Gaviscon contain magnesium trisilicate in doses of 20 to 40mg, and it is suggested that 2 to 4 pills be taken up to 4 times a day as symptoms persist. Caution must be exercised when taking these drugs, as too much magnesium trisilicate can be harmful. Material Safety Data Sheets, MSDS, are a useful resource for learning about the properties, hazards, and necessary precautions for a specific chemical compound in its pure form.
Properties
Magnesium trisilicate is a white, odorless powder with the chemical formula 2MgO.3SiO3.xH2O. It is insoluble in both water and alcohol. There is no evidence of flammability reported in the MSDS and it does require a specific type of storage.
Hazards
Pure magnesium trisilicate is very hazardous if inhaled or ingested. It is also irritating to the skin and eyes if direct contact is made. No known carcinogenic, mutagenic, or teratogenic effects are specified in the MSDS for magnesium trisilicate. The substance is, however, reported to be toxic to the lungs and mucous membranes and the MSDS warns that repeated or prolonged exposure can damage target organs.
Exposure Controls
Use local exhaust ventilation or process enclosures to limit airborne levels. If fumes, mist, or dust is generated from user operation, use ventilation to keep exposure to airborne contaminants below the exposure limit.
First Aid Measures
In the event of contact with eyes or skin, wash the exposed area with plenty of water. Wash exposed skin again with non-abrasive soap, paying special attention to folds, crevices, creases, and the groin area. After washing, cover irritated skin with an emollient. Seek medical attention if irritation persists.
If magnesium trisilicate is inhaled, move the exposed person to a well ventilated area and seek immediate medical attention.
Do not induce vomiting if magnesium trisilicate is ingested. Loosen tight clothing such as collars, ties, waistbands, or belts and perform mouth-to-mouth resuscitation if the victim is not breathing. Seek medical attention to ensure proper recovery.
Accidental Release Measures
If a small amount of magnesium trisilicate is spilled, put the spilled solid into a waste disposal container using the appropriate tools. Spread water onto the contaminated surface. Dispose of the chemical according to local and regional requirements.
If a large amount of magnesium trisilicate is spilled, use a shovel to put the solid into a waste disposal container. Spread water onto the contaminated surface and allow the substance to evacuate through the sanitary system. Wear the appropriate personal protective equipment before attempting to clean a large spill. This includes splash goggles, a full suit, a dust respirator, boots, gloves, and a self-contained breathing apparatus. Further protection may be necessary -- consult a specialist.
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