1.08488

Urea

for biochemistry

• Synonim(y): Carbamide, Carbonyl diamide, Diaminomethanone, Carbonyldiamine, Carbamide, Carbonyldiamide
• Wzór liniowy: NH₂CONH₂
• Numer CAS: 57-13-6
• Masa cząsteczkowa: 60.06
• Beilstein: 635724
• Numer MDL: MFCD00008022
• Kod UNSPSC: 12352111
• Numer indeksu EC: 200-315-5

Właściwości

• ciśnienie pary: <0.1 hPa ( 20 °C)
• Poziom jakości: 100
• Postać: solid
• siła działania: 8471 mg/kg LD₅₀, oral (Rat); 8200 mg/kg LD₅₀, skin (Rat)
• metody: titration: suitable
• pH: 9 (20 °C, 100 g/L in H₂O)
• mp: 132-135 °C (lit.)
• rozpuszczalność: 1000 g/L
• gęstość: 1.335 g/mL at 25 °C (lit.)
• gęstość nasypowa: 720‑760 kg/m³
• temp. przechowywania: 10-30°C
• ciąg SMILES: NC(N)=O
• InChI: 1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)
• Klucz InChI: XSQUKJJJFZCRTK-UHFFFAOYSA-N

Opis

Zastosowanie

Used for the denaturation of proteins and as a mild solubilization agent for insoluble or denatured proteins. Useful for renaturing proteins from samples already denatured with 6 M guanidine chloride such as inclusion bodies. May be used with guanidine hydrochloride and dithiothreitrol (DTT) in the refolding of denatured proteins into their native or active form.

Komentarz do analizy

Purity (DSC (differential scanning calorimetry)): ≥ 99.5 %
Identity (IR-spectrum): passes test
Appearance: Colorless crystals or white crystalline powder.
Appearance of solution (100 g/l, water): Clear and colorless.
Melting point (DSC (differential scanning calorimetry)): 132 - 135 °C
UV-Absorption (260 nm; 8 mol/l; 1 cm; water): ≤ 0.1
UV-Absorption (280 nm; 8 mol/l; 1 cm; water): ≤ 0.1
Cyanide (CN): ≤ 0.000001 %
Chloride (Cl): ≤ 0.0005 %
Sulfate (SO₄): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.0004 %
Fe (Iron): ≤ 0.00002 %
NH₄ (Ammonium): ≤ 0.00001 %
Biuret: ≤ 0.05 %
Sulfated ash (800 °C): ≤ 0.01 %

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Informacja o środkach bezpieczeństwa

• Kod klasy składowania: 11 - Combustible Solids
• Klasa zagrożenia wodnego (WGK): WGK 1
• Temperatura zapłonu (°F): Not applicable
• Temperatura zapłonu (°C): Not applicable