25022

Natriumacetat Trihydrat

puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E262, 99.0-101.0% (calc. to the dried substance), ≤0.00002% Al

• Synonym(e): Essigsäure Natriumsalz Trihydrat
• Lineare Formel: CH₃COONa · 3H₂O
• CAS-Nummer: 6131-90-4
• Molekulargewicht: 136.08
• Beilstein: 3732037
• EG-Nummer: 204-823-8
• MDL-Nummer: MFCD00071557
• UNSPSC-Code: 12352300
• PubChem Substanz-ID: 329752766
• NACRES: NA.21

Eigenschaften

• Qualität: puriss.; meets analytical specification of Ph. Eur., BP, USP, FCC, E262
• Assay: 99.0-101.0% (calc. to the dried substance)
• Form: powder or crystals
• Selbstzündungstemp.: 1112 °F
• Verunreinigungen: organic volatile impurities, complies (GC); reducing matter, complies; residual solvents, in accordance; ≤0.00002% Al; ≤0.001% heavy metals (as Pb); ≤0.002% KMnO₄ red. matter (as O); ≤0.1% KMnO₄ red. matter (as HCOOH)
• Verlust: 39.0-40.5% loss on drying, 130 °C
• pH-Wert: 7.5-9.0 (20 °C, 5%)
• Anionenspuren: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• Kationenspuren: Al: ≤0.2 mg/kg; As: ≤2 mg/kg; Ca: ≤20 mg/kg; Cu: ≤10 mg/kg; Fe: ≤10 mg/kg; Hg: ≤1 mg/kg; K: ≤200 mg/kg; Mg: ≤20 mg/kg; Pb: ≤2 mg/kg; Zn: ≤10 mg/kg
• Eignung: complies for appearance of solution
• SMILES String: O.O.O.[Na+].CC([O-])=O
• InChI: 1S/C2H4O2.Na.3H2O/c1-2(3)4;;;;/h1H3,(H,3,4);;3*1H2/q;+1;;;/p-1
• InChIKey: AYRVGWHSXIMRAB-UHFFFAOYSA-M

Beschreibung

Allgemeine Beschreibung

Sodium acetate trihydrate can be obtained from the crystallization of sodium acetate in water. On heating at 75°C, it melts, while on heating above 120°C it loses water of crystallization and gets converted into anhydrous form. The hyperfine proton and ¹³C splittings have been evaluated by recording ESR spectra of its irradiated single crystals. ESR studies suggested the existence of trapped methyl radicals. Its crystals are monoclinic and their structure has been investigated by photographic methods. Unit cell parameters were evaluated.

Anwendung

Sodium acetate trihydrate may be used in the fabrication of silicone/sodium acetate trihydrate hybrid, a water-responsive shape memory hybrid.

Sonstige Hinweise

Enzymsubstrat für Acetatkinase (EC 2.7.2.1)

Sicherheitshinweise

• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable