239216

Carbonato di calcio

ACS reagent, ≥99.0%, powder

• Formula condensata: CaCO₃
• Numero CAS: 471-34-1
• Peso molecolare: 100.09
• Beilstein: 8008338
• Numero CE: 207-439-9
• Numero MDL: MFCD00010906
• Codice UNSPSC: 12352300
• ID PubChem: 329752519
• NACRES: NA.21
• Saggio: ≥99.0%
• Grado: ACS reagent
• Stato: powder

Proprietà

• Grado: ACS reagent
• Livello qualitativo: 200
• Saggio: ≥99.0%
• Stato: powder
• Impurezze: ≤0.002 meq/g water-soluble titr. base; ≤0.005% oxidizers; ≤0.01% NH₄OH pptd.; ≤0.01% insol. dil. HCl
• pH: 8
• Densità: 2.93 g/mL at 25 °C (lit.)
• Anioni in tracce: chloride (Cl^-): ≤0.001%; fluoride (F^-): ≤0.0015%; sulfate (SO₄^2-): ≤0.01%
• Cationi in tracce: 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)
• Stringa SMILE: [Ca++].[O-]C([O-])=O
• InChI: 1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2; VTYYLEPIZMXCLO-UHFFFAOYSA-L

Descrizione

Descrizione generale

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.

Applicazioni

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.

Altre note

Go to Redi-Dri^™ Product Listing 795445

Note legali

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

Informazioni sulla sicurezza

• Codice della classe di stoccaggio: 11 - Combustible Solids
• Classe di pericolosità dell'acqua (WGK): nwg
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable