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Urea CAS#57-13-6

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Chemical Name：Urea

CAS No.:57-13-6

Molecular Formula：CH4N2O

Molecular weight:60.06

Sample: Available

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Product Details

Urea CAS#57-13-6

The urea molecule is planar in the crystal structure, but the geometry around the nitrogens is pyramidal in the gas-phase minimum-energy structure. In solid urea, the oxygen center is engaged in two N-H-O hydrogen bonds. The resulting dense and energetically favourable hydrogen-bond network is probably established at the cost of efficient molecular packing: The structure is quite open, the ribbons forming tunnels with square cross-section. The carbon in urea is described as sp2 hybridized, the C-N bonds have significant double bond character, and the carbonyl oxygen is basic compared to, say, formaldehyde. Urea's high aqueous solubility reflects its ability to engage in extensive hydrogen bonding with water.

Urea CAS#57-13-6

Urea Chemical Properties

Melting point	132-135 °C(lit.)
Boiling point	332.48°C (estimate)
density	1.335 g/mL at 25 °C(lit.)
vapor pressure	<0.1 hPa (20 °C)
refractive index	n20/D 1.40
storage temp.	2-8°C
solubility	H2O: 8 M at 20 °C
form	powder
pka	0.10(at 25℃)
color	white
Specific Gravity	1.335
Odor	almost odorless
PH	8.0-10.0 (20℃, 8M in H2O)
Water Solubility	1080 g/L (20 ºC)
λmax	λ: 260 nm Amax: 0.03 λ: 280 nm Amax: 0.02
Merck	14,9867
BRN	635724
Dielectric constant	3.5（Ambient）
Stability:	Substances to be avoided include strong oxidizing agents. Protect from moisture.
InChIKey	XSQUKJJJFZCRTK-UHFFFAOYSA-N
LogP	-1.660 (est)
CAS DataBase Reference	57-13-6(CAS DataBase Reference)
NIST Chemistry Reference	Urea(57-13-6)
EPA Substance Registry System	Urea (57-13-6)

Safety Information

Hazard Codes	Xn,Xi
Risk Statements	36/37/38-40-38
Safety Statements	26-36-24/25-37
RIDADR	Not regulated
WGK Germany	1
RTECS	YR6250000
TSCA	Yes
HS Code	31021010
Hazardous Substances Data	57-13-6(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 8471 mg/kg LD50 dermal Rat 8200 mg/kg

Product Usage

Urea is a physiological regulator of nitrogen excretion in mammals; synthesized in the liver as an end-product of protein catabolism and excreted in urine. Also occurs normally in skin. Emollient; diu retic.

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.

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