239216

Carbonato de calcio

ACS reagent, ≥99.0%, powder

• Fórmula lineal: CaCO₃
• Número de CAS: 471-34-1
• Peso molecular: 100.09
• Beilstein: 8008338
• Número CE: 207-439-9
• Número MDL: MFCD00010906
• Código UNSPSC: 12352300
• ID de la sustancia en PubChem: 329752519
• NACRES: NA.21

Propiedades

• grado: ACS reagent
• Ensayo: ≥99.0%
• Formulario: powder
• impurezas: ≤0.002 meq/g water-soluble titr. base; ≤0.005% oxidizers; ≤0.01% NH₄OH pptd.; ≤0.01% insol. dil. HCl
• pH: 8
• densidad: 2.93 g/mL at 25 °C (lit.)
• trazas de anión: chloride (Cl^-): ≤0.001%; fluoride (F^-): ≤0.0015%; sulfate (SO₄^2-): ≤0.01%
• trazas de catión: Ba: ≤0.005%; Fe: ≤0.003%; K: ≤0.01%; Mg: ≤0.02%; NH₄⁺: ≤0.003%; Na: ≤0.1%; Sr: ≤0.1%; heavy metals: ≤0.001% (by ICP-OES)
• cadena SMILES: [Ca++].[O-]C([O-])=O
• InChI: 1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
• Clave InChI: VTYYLEPIZMXCLO-UHFFFAOYSA-L

Descripción

Descripción general

CaCO₃ occurs naturally as the principal constituent of limestone, marble, and chalk, which can be prepared by the precipitation from dissolved calcium hydroxide and carbon dioxide.

Aplicación

Calcium carbonate can be used as a precursor to prepare Pd/CaCO₃, which can be used as a catalyst:

• In Miyaura-Suzuki cross-coupling reactions.
• In the ligand-free Stille cross-coupling reaction between aryl halides and tributylphenyltin to synthesize biphenyls.

It can also be used as a base in the Pd-catalyzed regioselective Heck reaction of fluorinated haloaryls with olefins to synthesize substituted olefins.

Otras notas

Go to Redi-Dri^™ Product Listing 795445

Información legal

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Información de seguridad

• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): nwg
• Punto de inflamabilidad (°F): Not applicable
• Punto de inflamabilidad (°C): Not applicable