398101

Calcium carbonate

ACS reagent, chelometric standard, 99.95-100.05% dry basis

• Linear Formula: CaCO₃
• CAS Number: 471-34-1
• Molecular Weight: 100.09
• Beilstein/REAXYS Number: 8008338
• EC Number: 207-439-9
• MDL number: MFCD00010906
• UNSPSC Code: 12352300
• PubChem Substance ID: 24864718
• NACRES: NA.21

Properties

• grade: ACS reagent; chelometric standard
• Quality Level: 200
• assay: 99.95-100.05% dry basis
• form: powder
• impurities: ≤0.01% NH₄OH pptd.; ≤0.01% insol. dil. HCl
• pH: 8
• solubility: dilute HCl: 6.7%
• density: 2.93 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.001%; fluoride (F^-): ≤0.0015%; sulfate (SO₄^2-): ≤0.005%
• cation traces: Ba: ≤0.01%; Fe: ≤0.002%; K: ≤0.01%; Mg: ≤0.01%; NH₄⁺: ≤0.003%; Na: ≤0.01%; Sr: ≤0.1%; heavy metals: ≤0.001% (by ICP)
• 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

Description

General description

Calcium carbonate is a calcium salt commonly found in shells and skeleton of marine animals. It is an inexpensive, non-toxic and easily available reagent with a wide range of applications.

Application

Calcium carbonate may be used:

• As a pore generating agent to prepare porous ceramics.
• As chelometric standard for the standardization of EDTA solution.
• To extract aluminium by microwave induced thermal activation of coal fly ash (CFA).

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: dust mask type N95 (US), Eyeshields, Gloves