Urea

Name: Urea
Brand: MM

GR for analysis ACS,Reag. Ph Eur

Synonym(s):

Carbamide, Carbonyl diamide, Diaminomethanone, Carbonyldiamine, Carbamide, Carbonyldiamide

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About This Item

Linear Formula:

NH₂CONH₂

CAS Number:

57-13-6

Molecular Weight:

60.06

UNSPSC Code:

12352111

NACRES:

NA.21

EC Index Number:

200-315-5

MDL number:

MFCD00008022

Beilstein/REAXYS Number:

635724

Product Name

Urea, GR for analysis ACS,Reag. Ph Eur

InChI

1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)

SMILES string

NC(N)=O

InChI key

XSQUKJJJFZCRTK-UHFFFAOYSA-N

grade

ACS reagent

agency

reag. Ph. Eur.

vapor pressure

<0.1 hPa ( 20 °C)

form

solid

potency

8471 mg/kg LD₅₀, oral (Rat)
8200 mg/kg LD₅₀, skin (Rat)

technique(s)

titration: suitable

pH

9 (20 °C, 100 g/L in H₂O)

mp

132-135 °C (lit.)

density

1.335 g/mL at 25 °C (lit.)

bulk density

720‑760 kg/m³

storage temp.

15-25°C

Quality Level

200

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Analysis Note

Assay (ex N): 99.0 - 100.5 %
Assay (ex N, calc. on dried substance): 99.0 - 101.5 %
Purity (DSC (differential scanning calorimetry)): ≥ 99.5 %
Identity (IR-spectrum): passes test
Appearance of solution (10 %; Wasser; colour): colourless
Appearance of solution (10 %; Wasser; clarity): clear
In water insoluble matter: ≤ 0.003 %
Acidity, Alkalinity: ≤ 0.0005 meq/g
Melting point (DSC): 132 - 135 °C
NH₄ (Ammonium): ≤ 0.0500 %
Chloride (Cl): ≤ 0.0005 %
Sulfate (SO₄): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.0004 %
Biuret: ≤ 0.05 %
Sulfated ash (600 °C): ≤ 0.005 %
Cu (Copper): ≤ 0.0001 %
Fe (Iron): ≤ 0.0001 %
Pb (Lead): ≤ 0.0002 %
Loss on Drying (105°C): ≤ 1.0 %
Corresponds to ACS, Reag. Ph Eur

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.

Other Notes

Replaces: UX0065-1

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c