33247

Harnstoff

ACS reagent grade, ≥99%, solid, puriss. p.a., reag. Ph. Eur.

• Synonym(e): Carbamid, Carbonyldiamid
• Lineare Formel: NH₂CONH₂
• CAS-Nummer: 57-13-6
• Molekulargewicht: 60.06
• NACRES: NA.21
• PubChem Substance ID: 57648752
• UNSPSC Code: 12352100
• EC Number: 200-315-5
• MDL number: MFCD00008022
• Beilstein/REAXYS Number: 635724
• Assay: ≥99%, 99-101% (calc. on dry substance)
• Form: solid

Eigenschaften

• Produktname: Harnstoff, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99%
• Quality Segment: 200
• agency: reag. Ph. Eur.
• grade: ACS reagent, puriss. p.a.
• assay: ≥99%, 99-101% (calc. on dry substance)
• form: solid
• impurities: alkalic reac. substances, complies, ≤0.0005% heavy metals (as Pb), ≤0.05% ammonium (NH₄), ≤0.1% biuret
• ign. residue: ≤0.01% (as SO₄)
• loss: ≤1.0% loss on drying, 105°C, 1 h
• mp: 132-135 °C
• solubility: H₂O: soluble 480 g/L at 20 °C
• density: 1.335 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤5 mg/kg, sulfate (SO₄^2-): ≤10 mg/kg
• cation traces: Fe: ≤2 mg/kg
• suitability: in accordance for appearance of solution, in accordance for identity
• functional group: amine
• SMILES string: NC(N)=O
• InChI: 1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)
• InChI key: XSQUKJJJFZCRTK-UHFFFAOYSA-N
• Gene Information: human ... CA1(759), CA2(760) ; rat ... Ppm1a(24666)

Beschreibung

General description

Urea is a colorless, odorless solid. It has prism-like crystals. It forms insoluble nitrate salts with nitric acid and oxalate salts with oxalic acid. On reaction with alkanes or substituted alkanes, it affords crystal-lattice inclusion compounds.

Urea is the most commonly used slow release nitrogen fertilizer.

Application

Urea has been used in the following studies:

• Synthesis of SnO₂ nanoparticles.
• Synthesis of urethanes, ureides and semicarbazides.
• Denaturation of protein isolated from Saccharomyces cerevisiae Y15696 strain.
• Protein electrophoretic studies.

Wird für die Denaturierung von Proteinen und als mildes Mittel zur Solubilisierung unlöslicher oder denaturierter Proteine?? verwendet. Nützlich für die Renaturierung von Proteinen aus Proben, die bereits mit 6 M Guanidinchlorid vergällt sind, wie z.B. Einschlüssen. Kann mit Guanidin-hydrochlorid und Dithiothreitrol (DTT) für die Rückfaltung von denaturierten Proteinen in ihre native oder aktive Form eingesetzt werden.

Sicherheitshinweise

• Lagerklasse: 11 - Combustible Solids
• Was ist los?: WGK 1
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• PSA (Persönliche Schutzausrüstung): Eyeshields, Gloves, type N95 (US)