791768

Sodium carbonate

anhydrous, free-flowing, Redi-Dri^™, ACS reagent, ≥99.5%

• Synonym(s): Calcined soda, Carbonic acid disodium salt, Soda ash
• Linear Formula: Na₂CO₃
• CAS Number: 497-19-8
• Molecular Weight: 105.99
• Beilstein/REAXYS Number: 4154566
• EC Number: 207-838-8
• MDL number: MFCD00003494
• UNSPSC Code: 12352302
• NACRES: NA.21

Properties

• grade: ACS reagent; anhydrous
• agency: suitable for EPA 300
• product line: Redi-Dri^™
• assay: ≥99.5%
• form: powder
• quality: free-flowing
• impurities: ≤0.005% silica; ≤0.01% insolubles
• loss: ≤1.0% loss on heating
• pH: 12 (25 °C, 106 g/L)
• mp: 851 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.001%; phosphate (PO₄^3-): ≤0.001%; sulfur compounds (as SO₄^2-): ≤0.003%
• cation traces: Ca: ≤0.03%; Fe: ≤5 ppm; K: ≤0.005%; Mg: ≤0.005%; heavy metals: ≤5 ppm (by ICP-OES)
• SMILES string: O=C(O[Na])O[Na]
• InChI: 1S/CH2O3.2Na/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2
• InChI key: CDBYLPFSWZWCQE-UHFFFAOYSA-L

Description

Application

• Denitrification mechanism of NaOH in the presence of carbon.: Explores the interaction between sodium carbonate and other chemicals in environmental applications, particularly focusing on denitrification processes important for water treatment (Li et al., 2005).


• Evaluation of capillary electrophoresis for determining the concentration of dissolved silica in geothermal brines.: Discusses the role of sodium carbonate in modifying sample pH for capillary electrophoresis, essential for accurate measurement of silica in complex geothermal fluids (Santoyo et al., 2005).

Biochem/physiol Actions

Buffer component, may be used for the removal of peripheral membrane proteins.

Legal Information

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

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H319
• pcodes: P264 - P280 - P305 + P351 + P338 - P337 + P313
• Hazard Classifications: Eye Irrit. 2
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable