Description

Carbonic Acid, Magnesium Salt CAS NO 7757-69-9 is a white, crystalline inorganic compound widely recognized as magnesium carbonate. This versatile material is valued for its role as a functional additive, offering properties such as acid neutralization, moisture absorption, and opacity. It serves as a critical ingredient for manufacturers in the pharmaceutical, food, and industrial sectors seeking reliable performance and consistent quality.

Application

• Pharmaceutical Excipient: Used as a diluent, desiccant, and anti-caking agent in tablet and powder formulations.
• Food Additive (E504): Functions as an anti-caking agent, acidity regulator, and release agent in food processing and powdered products.
• Industrial Filler & Extender: Employed in the production of paints, coatings, plastics, rubber, and ceramics to modify physical properties and reduce costs.
• Personal Care & Cosmetics: Acts as an absorbent, opacifying agent, and bulking agent in products like face powders, toothpaste, and bath salts.
• Sports & Gymnastics: Serves as a drying agent (gymnastics chalk) to improve grip by absorbing moisture from hands.
• Environmental & Water Treatment: Utilized in flue gas desulfurization and as a neutralizing agent for acidic waste streams.
• Fire Retardant & Smoke Suppressant: Incorporated into materials like cables and plastics to enhance fire safety properties.
• Agricultural & Animal Feed: Used as a magnesium supplement in animal feed and as a soil amendment to correct magnesium deficiencies.

Basic Information

Product Name	Carbonic Acid, Magnesium Salt
CAS No.	7757-69-9
Molecular Formula	MgCO3
Molecular Weight	84.31 g/mol
Synonyms	Magnesium Carbonate; Magnesite; Hydromagnesite; Magnesium Carbonate, Basic; Light Magnesium Carbonate; Heavy Magnesium Carbonate; Carbonic Acid Magnesium Salt (1:1); E504
EINECS	231-851-8

Quality Control

Our magnesium carbonate is produced under a strict quality management system to ensure batch-to-batch consistency and reliability. Quality is verified against relevant specifications, including USP-NF, FCC, and Ph. Eur. monographs where applicable. A comprehensive Certificate of Analysis (COA), detailing purity, assay, and impurity profiles, is provided with every shipment to support your quality assurance protocols.

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 opening to prevent absorption of atmospheric moisture, which can lead to caking and reduced efficacy.

Specification

Item	Specification
Appearance	White, fine powder
Identification (IR)	Conforms
Assay (as MgO)	40.0% - 43.5%
Loss on Drying	≤ 2.0%
Acid Insoluble Substances	≤ 0.05%
Calcium (Ca)	≤ 0.6%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Bulk Density	Contact for details

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