Dolomite is a massive calcareous sedimentary rock 
made of the mineral dolomite [CaMg(CO
3
)
2
, rhombohedral]. Usually dolomite as a rock contains, apart from dolomite, other carbonates (e.g., calcite, magnesite, and siderite), along with some silica and alumina, mostly as clays. For commercial 
purposes, the mass fraction of combined impurities must be below 7 wt.%, above which it 
becomes unsuitable for industrial use and is then used only for road ballasts and building 
stones. When the percentage of calcium carbonate (CaCO
3
) is above 10 wt.% or more over the 
theoretical composition, the rock is termed calcitic dolomite, while with a departure from 
theoretical magnesite content the rock is called dolomitic limestone. With variations in 
MgCO
3
between 5 and 10 wt.%, it is called magnesian limestone, and when it contains up to 
5 wt.% MgCO
3
or less it is considered limestone for all purposes.

DOLOMITE

16389-88-1: Dolomite is a massive calcareous sedimentary rock 
made of the mineral dolomite [CaMg(CO
3
)
2
, rhombohedral]. Usually dolomite as a rock contains, apart from dolomite, other carbonates (e.g., calcite, magnesite, and siderite), along with some silica and alumina, mostly as clays. For commercial 
purposes, the mass fraction of combined impurities must be below 7 wt.%, above which it 
becomes unsuitable for industrial use and is then used only for road ballasts and building 
stones. When the percentage of calcium carbonate (CaCO
3
) is above 10 wt.% or more over the 
theoretical composition, the rock is termed calcitic dolomite, while with a departure from 
theoretical magnesite content the rock is called dolomitic limestone. With variations in 
MgCO
3
between 5 and 10 wt.%, it is called magnesian limestone, and when it contains up to 
5 wt.% MgCO
3
or less it is considered limestone for all purposes.

CAS 16389-88-1

DOLOMITE

Dolomite (CaMg(CO3)2)

Ref: 54-IN13462