Urea
| Urea | |
|---|---|
 
| |
| General | |
| Systematic name | Diaminomethanal |
| Other names | carbamide |
| Molecular formula | (NH2)2CO |
| SMILES | NC(=O)N |
| Molar mass | 60.07 g/mol |
| Appearance | white odourless solid |
| CAS number | [57-13-6] |
| Properties | |
| Density and phase | 1.33·103 kg/m3 [1], solid |
| Solubility in water | 108 g/100 ml (20 °C) 167 g/100 ml (40 °C) 251 g/100 ml (60 °C) 400 g/100 ml (80 °C) 733 g/100 ml (100 °C) |
| Melting point | 132.7 °C (406 K) decomposes |
| Boiling point | n.a. |
| Acidity (pKa) | 0.18 |
| Basicity (pKb) | 13.82 |
| Chiral rotation [α]D | Not chiral |
| Viscosity | ? cP at ? °C |
| Critical relative humidity | 81% (20°C) 73% (30°C) |
| Heat of solution in water | -57,8 cal/g (endothermic) |
| Nitrogen content | 46,6 %N |
| Structure | |
| Molecular shape | ? |
| Coordination geometry | trigonal planar |
| Crystal structure | ? |
| Dipole moment | ? D |
| Hazards | |
| MSDS | J.T. Baker |
| Main hazards | ? |
| Flash point | ? °C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| NFPA 704 |
 0
1
0
estimated |
| Supplementary data page | |
| Structure & properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | ? |
| Other cations | ? |
| Related ? | biuret triuret thiourea |
| Related compounds | ? |
| Except where noted otherwise, data are given for materials in their standard state (at 26°C, 100 kPa) Infobox disclaimer and references | |