Description

Magnesium Trisilicate is a fine, white, odorless powder with the chemical formula Mg2Si3O8·nH2O. This inorganic compound is valued for its high surface area, adsorptive capacity, and chemical inertness, making it a versatile functional material. It is primarily sought by manufacturers in the pharmaceutical, food, and industrial sectors for its role as an antacid, anti-caking agent, and reinforcing filler.

Application

• Pharmaceutical Antacid & Excipient: Used as an active ingredient in over-the-counter antacid formulations to neutralize gastric acid and relieve heartburn or indigestion. Also functions as a tablet and capsule diluent or glidant.
• Food Additive (Anti-caking Agent): Approved as a food-grade additive (E553a) to prevent clumping in powdered food products like table salt, spices, and baking mixes, ensuring free-flowing properties.
• Industrial Adsorbent & Clarifying Agent: Employed in chemical processes to adsorb impurities, colors, or moisture from liquids and gases, and as a clarifying agent in the production of oils and beverages.
• Reinforcing Filler in Polymers & Rubber: Acts as a cost-effective filler to improve the mechanical strength, dimensional stability, and heat resistance of silicone rubber, plastics, and other composite materials.
• Catalyst Support & Carrier: Provides a high-surface-area, inert base for supporting catalysts in various organic synthesis and petrochemical reactions.
• Cosmetics & Personal Care: Utilized in products like face powders and creams as an absorbent, opacifying agent, or texture enhancer.

Basic Information

Product Name	Magnesium Trisilicate
CAS No.	14987-04-3
Molecular Formula	Mg2Si3O8·nH2O
Molecular Weight	260.86 g/mol (anhydrous basis)
Synonyms	Magnesium silicate (3:2); Trisilicic acid, magnesium salt; Florisil; Synthetic Florisil; Magnesium polysilicate; Antacid; E553a; INS 553a
EINECS	239-076-7

Quality Control

Our Magnesium Trisilicate is manufactured under a strict quality management system. Production batches are tested against relevant pharmacopeial standards (such as USP/EP for pharmaceutical grades or FCC for food grades) to ensure identity, purity, and performance. A comprehensive Certificate of Analysis (COA) documenting parameters like assay, loss on drying, heavy metals, and microbial limits is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after each use to minimize exposure to atmospheric moisture, which can affect flow properties and potency.

Specification

Item	Specification
Appearance	White, fine powder
Identification (IR)	Conforms
Assay (as Mg2Si3O8)	≥ 95.0%
Loss on Drying	≤ 15.0 %
Acid-consuming Capacity	≥ 140 ml per g
Chloride	≤ 0.1 %
Sulfate	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Microbial Limits	Meets Ph. Eur. / USP criteria

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.