239216

Carbonato de cálcio

ACS reagent, ≥99.0%, powder

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

Propriedades

• grau: ACS reagent
• Nível de qualidade: 200
• Ensaio: ≥99.0%
• Formulário: powder
• Impurezas: ≤0.002 meq/g water-soluble titr. base; ≤0.005% oxidizers; ≤0.01% NH₄OH pptd.; ≤0.01% insol. dil. HCl
• pH: 8
• densidade: 2.93 g/mL at 25 °C (lit.)
• traços de ânion: chloride (Cl^-): ≤0.001%; fluoride (F^-): ≤0.0015%; sulfate (SO₄^2-): ≤0.01%
• traços de cátion: 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)
• cadeia de caracteres SMILES: [Ca++].[O-]C([O-])=O
• InChI: 1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
• chave InChI: VTYYLEPIZMXCLO-UHFFFAOYSA-L

Descrição

Descrição geral

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.

Aplicação

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.

Outras notas

Go to Redi-Dri^™ Product Listing 795445

Informações legais

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

Informações de segurança

• Código de classe de armazenamento: 11 - Combustible Solids
• Classe de risco de água (WGK): nwg
• Ponto de fulgor (°F): Not applicable
• Ponto de fulgor (°C): Not applicable