Magnesium Hydroxide

Magnesium Hydroxide

Magnesium Hydroxide, Mg(OH)2, is an inorganic hydrated compound that can be found in the mineral brucite.

Magnesium hydroxide as a fire retardant:
Magnesium hydroxide, Mg(OH)2, is a fire retardant material that is characterized as being: inorganic, non-halogenated, and can also function as a smoke suppressant. It works to release water vapor when it absorbs heat (an endothermic reaction), and this dilutes surrounding the flammable oxygen gas. Additionally, the resulting char and magnesium oxide layer helps to add further resistance to fire.

Magnesium hydroxide is also known as MDH, especially as flame retardant additive. It is added to a variety of different products, but notably plastics that undergo higher temperature processing that ATH (aluminum hydroxide), would thermally decompose at.

Additional Notes:
* Magnesium hydroxide is commonly known as milk of magnesia, a popular laxative and anti-acid.

Product Details

CASProductChemPurityProduct CodeQuote
1309-42-8Magnesium HydroxideMg(OH)2%MOX-08-XQuote;
Chemistry TDS SDS
Mg(OH)2 Request TDS Request SDS


Flame Retardant/ Smoke Suppressant Additive: Plastic +, Environmental Treatment, Medicinal, Rubber, Pharmaceutical