水菱镁矿

Description

Hydromagnesite · CAS 12072-90-1 · MgCO3. UNII 0IHC698356. Melting Point: 990 °C; Solubility: 0.01 % (NIOSH, 2024); Solubility: 0.1g/L.

Identification

CAS Registry Number	12072-90-1
PubChem CID	11029
Molecular formula	MgCO3
IUPAC name	magnesium carbonate
UNII (FDA)	0IHC698356

Computed Descriptors

Molecular Weight	84.31
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	83.9697855
Monoisotopic Mass	83.9697855
Topological Polar Surface Area	63.2
Heavy Atom Count	5
Formal Charge	0
Complexity	18.8

Physical & Chemical Properties

Melting Point	990 °C
Solubility	0.01 % (NIOSH, 2024)
Solubility	0.1g/L
Solubility	0.01%
Density	3.0
Density	2.96
Density	3.01 @25 °C
Vapor Pressure	0 mmHg (approx) (NIOSH, 2024)
Vapor Pressure	0 mmHg (approx)
Decomposition	350 °C

Physical description & handling notes

• Magnesite appears as white, yellowish, grayish-white or brown crystalline solid or crystalline powder. Density: 3-3.1 g cm-3. An important ore for magnesium. Used in the manufacture of materials capable of withstanding very high temperatures. Sometimes used to produce carbon dioxide.
• Wet Solid; Other Solid; Dry Powder; CBI; Large Crystals; Other Solid; Large Crystals; Liquid
• Odourless, light, white friable masses or as a bulky white powder
• White, odorless, crystalline powder; [NIOSH]
• WHITE POWDER.
• White, odorless, crystalline powder.

Regulatory Status

Regulatory & Food Contact	ANTICAKING_AGENT; BLEACHING_AGENT; COLOUR_RETENTION_AGENT: Food Additives Magnesium carbonate is a basic hydrated or a monohydrated magnesium carbonate or a mixture of the two. NOT LIMITED NMRS 40/TRS 339-JECFA 9/16 FAS 67.29/NMRS 40A,B,C-JECFA 9/159 CIR / INCI: Cosmetic ingredients (Magnesium Carbonate) -> CIR (Cosmetic Ingredient Review)
GHS notification summary	96.6% (982 / 1017)

GHS Hazard Classification

GHS notification summary	96.6% (982 / 1017)

Documented Uses

• CIR ingredient: Magnesium Carbonate
• Magnesium carbonate is added to table salt, and it is used as an antacid. [ACGIH] Used to make other compounds in the paint, ink, fireproofing, flooring, polishing, plastics, and rubber industries; [HSDB]
• In foods as a drying agent, color retention agent, anticaking agent and a carrier.
• For more Uses (Complete) data for MAGNESIUM CARBONATE (11 total), please visit the HSDB record page.
• Plastics -> Typical concentration range in plastic materials -> 1%
• EPA Safer Chemical Functional Use Classes -> Processing Aids and Additives

Synonyms

MAGNESIUM CARBONATE; 546-93-0; Magnesite; Magnesium carbonate anhydrous; Kimboshi; Magmaster; Apolda; Destab; Magfy; Carbonate magnesium; Carbonic acid, magnesium salt (1:1); Magnesium carbonate (1:1); GP 20 (carbonate); MA 70 (carbonate); DCI light magnesium carbonate; Gold Star (carbonate)

Frequently Asked Questions

What are the CAS number and molecular formula of Hydromagnesite?

CAS 12072-90-1; molecular formula MgCO3; molecular weight — g/mol.

What other names is Hydromagnesite known by?

MAGNESIUM CARBONATE, 546-93-0, Magnesite, Magnesium carbonate anhydrous, Kimboshi, Magmaster.

What is the regulatory status of Hydromagnesite?

Documented regulatory listings: ANTICAKING_AGENT; BLEACHING_AGENT; COLOUR_RETENTION_AGENT: Food Additives; Magnesium carbonate is a basic hydrated or a monohydrated magnesium carbonate or a mixture of the two.; NOT LIMITED.

Is Hydromagnesite classified as hazardous?

96.6% of GHS notifications report no hazard classification (982 of 1017).

What are the key physical properties of Hydromagnesite?

Melting Point: 990 °C; Solubility: 0.01 % (NIOSH, 2024); Solubility: 0.1g/L; Solubility: 0.01%.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.