Description

Magnesium Carbonate Heavy CAS NO 39710-20-8 is a high-density, basic magnesium carbonate compound valued for its superior physical properties and functionality. It serves as a versatile processing aid and functional additive across numerous industries, offering excellent performance as a drying agent, anti-caking agent, and reinforcing filler. This product is essential for manufacturers in the pharmaceutical, food, rubber, plastics, and personal care sectors seeking reliable quality and consistent results.

Application

• Pharmaceutical Excipient: Used as a desiccant, anti-caking agent, and flow aid in tablet and powder formulations.
• Food Additive (FCC Grade): Functions as an anti-caking agent, drying agent, and color retention aid in powdered food products like table salt and spices.
• Rubber & Plastics Industry: Acts as a reinforcing filler, acid acceptor, and processing aid to improve physical properties and thermal stability.
• Personal Care & Cosmetics: Utilized as an absorbent, opacifying agent, and viscosity modifier in products like face powders, body powders, and toothpaste.
• Sports & Gymnastics: Applied as a drying agent (gymnastics chalk) to improve grip by absorbing moisture from hands.
• Industrial Applications: Serves as a flame retardant and smoke suppressant filler in polymers and building materials.
• Chemical Precursor: Used in the production of other magnesium compounds and specialty chemicals.

Basic Information

Product Name	Magnesium Carbonate Heavy
CAS No.	39710-20-8
Molecular Formula	xMgCO₃·yMg(OH)₂·zH₂O
Molecular Weight	Variable (Hydrated basic carbonate)
Synonyms	Heavy Magnesium Carbonate; Basic Magnesium Carbonate; Hydromagnesite; Magnesite Alba; Magnesium Carbonate Hydroxide Hydrate; Magnesium Hydrogen Carbonate; Gymnastics Chalk; Food Additive E504(ii)
EINECS	Contact for details

Quality Control

Our Magnesium Carbonate Heavy is manufactured under a strict quality management system to ensure batch-to-batch consistency and reliability. The product can be supplied to meet various industry standards, including USP-NF, FCC, and technical grades. Each batch is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, heavy metals, loss on drying, and other critical parameters to guarantee it meets your specific application requirements.

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 moisture absorption and caking.

Specification

Item	Specification
Appearance	White, light, bulky powder
Identification (IR)	Conforms
Assay (as MgO)	40.0% - 43.5%
Loss on Drying	Contact for details
Acid Insoluble Substances	≤ 0.05%
Calcium (Ca)	≤ 0.45%
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.