Urea is useful as a denaturing agent for proteins and nucleic acids and as a chaotropic agent in denaturing PAGE.||Synonyms:|Carbimide; Carbonyldiimide||CAS No:|57-13-6||Molecular Formula:|CH4N2O||Molecular Weight:|60.06||Appearance:|White crystals||Purity:|≥99.5%||Solubility (3g in 10ml H2O):|Colorless, clear, complete||Absorbance (5mM H2O):|260nm: ≤0.05|280nm: ≤0.03||Melting Point:|132-135°C||Insoluble Matter:|≤0.01%||Residue on Ignition: |≤0.1%||Water (KF): |≤0.5%||Chloride:|≤0.0001%||Iron:|≤0.0001%||Sulfate:|≤0.01%||Heavy Metals (Pb):|≤0.002%||Lead (Pb):|≤0.0005%||Cyanate (CNO):|≤0.03%||Copper (Cu):|≤0.0001%||RNase, DNase or Protease:|None Detected||Storage and Stability:|May be stored at RT. Stable for 12 months after receipt.