31146

Borsäure

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., buffer substance, ≥99.8%

• Lineare Formel: H₃BO₃
• CAS-Nummer: 10043-35-3
• Molekulargewicht: 61.83
• EG-Nummer: 233-139-2
• MDL-Nummer: MFCD00011337
• UNSPSC-Code: 12352106
• eCl@ss: 38120104
• PubChem Substanz-ID: 329753669
• NACRES: NA.21

Eigenschaften

• Qualität: ACS reagent; puriss. p.a.
• Qualitätsniveau: 200
• Agentur: USP/NF; reag. ISO; reag. Ph. Eur.
• Dampfdruck: 2.6 mmHg ( 20 °C)
• Assay: ≥99.8%
• Form: powder or crystals
• Verunreinigungen: ≤0.005% insoluble in methanol; ≤0.05% with methanol-HCl non-volat. matter
• pH-Wert: 3.6-4.0 (20 °C, 4%)
• mp (Schmelzpunkt): 160 °C (dec.) (lit.)
• Löslichkeit: water: soluble
• Dichte: 1.440 g/cm³
• Anionenspuren: chloride (Cl^-): ≤3 mg/kg; phosphate (PO₄^3-): ≤5 mg/kg; sulfate (SO₄^2-): ≤5 mg/kg
• Kationenspuren: As: ≤5 mg/kg; Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤1 mg/kg; Mg: ≤5 mg/kg; Pb: ≤5 mg/kg; Zn: ≤5 mg/kg
• SMILES String: OB(O)O
• InChI: 1S/BH3O3/c2-1(3)4/h2-4H
• InChIKey: KGBXLFKZBHKPEV-UHFFFAOYSA-N

Beschreibung

Allgemeine Beschreibung

Boric acid can be used as a Lewis acid catalyst in organic synthesis to facilitate various organic reactions, including dehydration, hydrolysis, decarboxylation, and condensation reactions. It produces different borate anions and salts and can react with alcohols to produce borate esters. It is also used as a buffering agent and pH adjuster.

Boric acid is a very weak acid, having pH in the range of 3.6-4.0. Coulometric method for the determination of boric acid has been reported.

Anwendung

Boric acid can be used as a precursor to synthesize boron carbon oxynitride thin films by the atmospheric pressure chemical vapor deposition (APCVD) method using carbon-rich methane and nitrogen-rich ammonia.

Sicherheitshinweise

• Piktogramme: GHS08
• Signalwort: Danger
• H-Sätze: H360FD
• P-Sätze: P201 - P202 - P280 - P308 + P313 - P405 - P501
• Gefahreneinstufungen: Repr. 1B
• Lagerklassenschlüssel: 6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
• WGK: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable