239216

Calcium carbonate

ACS reagent, ≥99.0%, powder

• Lineáris képlet: CaCO₃
• CAS-szám: 471-34-1
• Molekulatömeg: 100.09
• Beilstein: 8008338
• EC-szám: 207-439-9
• MDL-szám: MFCD00010906
• UNSPSC kód: 12352300
• PubChem Substance ID: 329752519
• NACRES: NA.21
• Teszt: ≥99.0%
• grade: ACS reagent
• Forma: powder

Tulajdonságok

• grade: ACS reagent
• Minőségi szint: 200
• Teszt: ≥99.0%
• Forma: powder
• szennyeződések: ≤0.002 meq/g water-soluble titr. base; ≤0.005% oxidizers; ≤0.01% NH₄OH pptd.; ≤0.01% insol. dil. HCl
• pH: 8
• sűrűség: 2.93 g/mL at 25 °C (lit.)
• anion nyomok: chloride (Cl^-): ≤0.001%; fluoride (F^-): ≤0.0015%; sulfate (SO₄^2-): ≤0.01%
• kation nyomok: 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)
• SMILES string: [Ca++].[O-]C([O-])=O
• InChI: 1S/CH2O3.Ca/c2-1(3)4;/h(H2,2,3,4);/q;+2/p-2
• Nemzetközi kémiai azonosító kulcs: VTYYLEPIZMXCLO-UHFFFAOYSA-L

Leírás

Általános leírás

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.

Alkalmazás

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.

Egyéb megjegyzések

Go to Redi-Dri^™ Product Listing 795445

Jogi információk

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

Biztonsági adatok

• Tárolási osztály kódja: 11 - Combustible Solids
• WGK: nwg
• Lobbanási pont (F): Not applicable
• Lobbanási pont (C): Not applicable