795445

Calcium carbonate

anhydrous, free-flowing, Redi-Dri^™, ACS reagent, ≥99%

• Wzór liniowy: CaCO₃
• Numer CAS: 471-34-1
• Masa cząsteczkowa: 100.09
• UNSPSC Code: 12352300
• NACRES: NA.21
• PubChem Substance ID: 329768485
• EC Number: 207-439-9
• Beilstein/REAXYS Number: 8008338
• MDL number: MFCD00010906
• Assay: ≥99%
• Grade: ACS reagent, anhydrous
• Form: powder
• Solubility: H₂O: insoluble

Właściwości

• Quality Segment: 200
• grade: ACS reagent, anhydrous
• product line: Redi-Dri^™
• assay: ≥99%
• form: powder
• quality: free-flowing
• impurities: ≤0.002 meq/g water-soluble titr. base, ≤0.005% oxidizers, ≤0.01% NH₄OH pptd., ≤0.01% insol. dil. HCl
• pH: 8
• solubility: H₂O: insoluble
• density: 2.93 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.001%, fluoride (F^-): ≤0.0015%, sulfate (SO₄^2-): ≤0.01%
• cation traces: 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
• InChI key: VTYYLEPIZMXCLO-UHFFFAOYSA-L

Opis

General description

Calcium carbonate is an inorganic compound that is commonly used as a solid base catalyst in some organic transformations. It is also used as an acid scavenger and stabilizing agent for acid-sensitive compounds. Additionally, CaCO₃ is the most widely used additive in plastic and elastomeric applications due to its wide availability.

Application

• Spectrophotometric Analysis: Chromotropic acid disodium salt dihydrate is used in spectrophotometric methods for detecting and quantifying metal ions. Studies have shown its effectiveness in forming stable complexes with metal ions such as thorium, which can then be analyzed spectrophotometrically. This application is essential for environmental and industrial monitoring of metal contaminants (Issa et al., International Journal of Pharmaceutical Sciences Review and Research, 2022).

Features and Benefits

• Increased efficiency – Eliminates time and effort of loosening hardened powders     
• Safety – Eliminates tools of force used to break up clumps
• Ecology – Reduces waste as it does not stick to the packaging
• Economy – Faster preparation and solvation increase productivity and reduce costs     
• Assured Quality – Excellent, expert-tested quality with no anti-caking agents      
• Flexible volumes – Available from research amounts to scale-up quantities

Legal Information

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

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Informacja o środkach bezpieczeństwa

• Klasa składowania: 13 - Non Combustible Solids
• Co się dzieje?: nwg
• Temperatura zapłonu (°F): Not applicable
• Temperatura zapłonu (°C): Not applicable