Description

Magnesium Carbonate, Light Ar CAS NO 53678-75-4 is a high-purity, fine-powdered inorganic salt known for its low bulk density and exceptional reactivity. This material is critical for applications requiring a high surface area and rapid dispersion, offering superior performance as a functional additive. It is an essential raw material for manufacturers in the pharmaceutical, food, personal care, and specialty chemical industries seeking consistent quality and reliable supply.

Application

• Pharmaceutical Excipient: Widely used as an anti-caking agent, desiccant, and filler in tablet and powder formulations.
• Food Additive (E504): Functions as an anti-caking agent, acidity regulator, and release agent in food processing and powdered food products.
• Personal Care & Cosmetics: Serves as an opacifying agent, absorbent, and viscosity modifier in body powders, face masks, and deodorants.
• Sports & Fitness: The "light" grade is preferred for gymnastic chalk and climbing chalk due to its excellent drying and gripping properties.
• Rubber & Plastics: Acts as a reinforcing filler and processing aid to improve mechanical properties and surface finish.
• Specialty Chemicals: Used as a precursor in the synthesis of other magnesium compounds and as a neutralizing agent.
• Industrial Absorbent: Effective for spill control and as a drying agent in various industrial processes.

Basic Information

Product Name	Magnesium Carbonate, Light Ar
CAS No.	53678-75-4
Molecular Formula	xMgCO₃·yMg(OH)₂·zH₂O (Hydrated basic magnesium carbonate)
Molecular Weight	Variable (for the basic compound approx. 485.65 g/mol for 4MgCO₃·Mg(OH)₂·5H₂O)
Synonyms	Light Magnesium Carbonate; Magnesium Carbonate Hydroxide Hydrate; Basic Magnesium Carbonate; Magnesite; Gymnastic Chalk; CAS 39409-82-0 (related); E504; Food Grade Magnesium Carbonate; Pharma Grade Magnesium Carbonate
EINECS	Contact for details

Quality Control

Our Magnesium Carbonate, Light Ar is produced under a stringent quality management system. We offer grades compliant with major pharmacopoeial standards including USP-NF, Ph. Eur., and BP, as well as FCC for food applications. Every batch undergoes rigorous testing for identity, assay, heavy metals, loss on drying, and specific physical parameters like bulk density. A comprehensive Certificate of Analysis (COA) is provided with each shipment to ensure traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture and CO₂, which can affect product performance.

Specification

Item	Specification
Appearance	White, light powder
Identification (IR)	Conforms
Assay (as MgO)	40.0% - 43.5%
Loss on Drying	≤ 2.0%
Acid Insoluble Substances	≤ 0.05%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Calcium (Ca)	≤ 0.5%
Bulk Density (Light Grade)	0.1 - 0.3 g/mL

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