Magnesium carbonate hydroxide

Magnesium carbonate hydroxide (CAS 12125-28-9) is an inorganic mineral compound used as a pH buffer, filler, and processing aid.

Where is Magnesium carbonate hydroxide used?

• Rubber and plastics compounding: reinforcing filler and acid scavenger improving thermal stability during processing
• Pharmaceuticals: excipient in tablet formulations, controlling pH and improving powder flowability for direct compression
• Food production: anti-caking agent and acidity regulator in powdered products under food-grade compliance
• Water treatment: adjusts alkalinity and neutralizes acidic effluents in municipal and industrial systems
• It manages acid neutralization and flow control in solid and semi-solid systems.
• Pharmaceutical use as an antacid.
• Water treatment for the removal of heavy metals and impurities.
• Intermediate in the production of magnesium citrate and other pharmaceuticals.

Formulation notes

• Effectiveness as a flame retardant and smoke suppressant is higher than that of aluminium hydroxide.

Typical specification

• Total metal impurities: 0.004% maximum (typical).
• Insoluble matter: 0.05% maximum (typical).
• Lead (Pb): 0.001% maximum (typical).

Regulatory status

• Not classified as a hazardous substance or mixture under Regulation (EC) No. 1272/2008 (EU).
• Classified under tariff code 2836 99 11.

Storage, packaging and handling

• Store in a cool, dry, ventilated area away from heat sources, protected from sunlight, in a tightly closed original container.

Frequently asked questions about Magnesium carbonate hydroxide

How does magnesium carbonate hydroxide function in rubber and polymer processing?

It neutralizes trace levels of hydrogen chloride released during processing, vulcanization, or thermal aging.

Under which food additive designation is basic magnesium carbonate used?

It is used as food additive E504 (basic magnesium carbonate).

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.