Urea
SIAL/NIST2141 - NIST® SRM® 2141
Synonym: Carbamide; Carbonyldiamide
CAS Number: 57-13-6
Empirical Formula (Hill Notation): CH4N2O
Molecular Weight: 60.06
MDL Number: MFCD00008022
Linear Formula: NH2CONH2
Product Type: Chemical
| application(s) | clinical testing |
| density | 1.335 g/mL at 25 °C (lit.) |
| form | crystals |
| grade | certified reference material |
| InChI | 1S/CH4N2O/c2-1(3)4/h(H4,2 |
| InChI key | XSQUKJJJFZCRTK-UHFFFAOYSA |
| manufacturer/tradename | NIST® |
| mp | 132-135 °C (lit.) |
| packaging | pkg of 2 g |
| Quality Level | 100  |
| SMILES string | NC(N)=O |
| Application: | Urea Standard reference material (SRM) is certified for calibrating and standardizing microchemical procedures aimed at determining nitrogen in organic matter. Additionally, it serves as a tool for standardizing techniques for nitrogen determination, when carbon and hydrogen are simultaneously analyzed. |
| Application: | 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. |
| Features and Benefits: | Available with a certificate documentingnitrogen value determined through a modification of the AOAC micro-Kjeldahlmethod. |
| General description: | SRM 2141_cert  SRM 2141_SDS |
| Legal Information: | NIST is a registered trademark of National Institute of Standards and Technology |
| Legal Information: | SRM is a registered trademark of National Institute of Standards and Technology |
| Other Notes: | Example analytes are listed below as a reference. Please download a current certificate at nist.gov/SRM for current analytes and certified values. Nitrogen (N) See certificate for values and more details at nist.gov/SRM. |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| mp | 132-135 °C (lit.) |
| Density | 1.335 g/mL at 25 °C (lit.) |
| UNSPSC | 41116107 |